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About This ReportMessage from the ChairmanAbout Us

CONTENTS

Shaping a Prosperous FutureCentered around SocialContribution

Innovation-Driven Development*Product and Service Safety and Quality*Data Security and Customer Privacy ProtectionSupply Chain Due Diligence*EmployeesSocial ContributionRural RevitalizationIndustry Co-construction

Advancing Steady ProgressGrounded on StrongGovernance

Corporate GovernanceCompliance Risk ControlInvestor Relations ManagementAnti-Commercial Bribery and Anti-CorruptionParty Building

Company Pro?leCorporate Development and ESG MilestonesPerformance in 2024Honorary PerformanceESG Management

Realizing SustainableDevelopment Rooted inEnvironmental Protection

Environmental Compliance Management*Energy UtilizationWater Resource UtilizationPollutant EmissionsWaste DisposalAddressing Climate ChangeCircular EconomyEcosystem and Biodiversity Conservation

*:Topics of Double Materiality

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2024 Sustainability ReportYunnan Tin Company Limited

This is the 17th Environmental, Social, and Governance (ESG) Report issued by Yunnan Tin Co., Ltd. ("the Company").To help shareholders, creditors, partners, employees, and other stakeholders gain an in-depth understanding ofthe Company's responsibilities and practices, this report provides a disclosure of the Company's developmentpractices and key achievements in environmental, social and corporate governance as well as the fulfilment of otherresponsibilities in 2024.

This report covers the period from January 1, 2024 to December 31, 2024. To improve the comparability andperspectiveness, some sections of this report may extend appropriately beyond this Reporting Period.Reporting Period

Shenzhen Stock Exchange Self-Regulatory Guidelines No. 17 for Companies Listed on Shenzhen Stock Exchange—Sustainability Report (for Trial Implementation) (hereinafter referred to as the "Guidelines")Shenzhen Stock Exchange Self-Regulatory Guidance No. 3 for Companies Listed on Shenzhen Stock Exchange—Preparation of Sustainability ReportSustainable Development Goals (SDGs) of the United NationsSustainability Reporting Standards (GRI Standards) of the Global Sustainability Standards BoardChina National Institute of Standardization (CNIS) Guidance on Social Responsibility Reporting (GB/T36001-2015)International Organization for Standardization (ISO) ISO 26000: Guidance on Social Responsibility (2010)

Basis for Compilation

The Company guarantees that the content of this report is true, accurate, and complete, without any false records,misleading statements, or material omissions.Assurance of Report Reliability

Yunnan Tin Co., Ltd. (hereinafter referred to as "Yunnan Tin", "the Company" or "We")Datun Tin Mine Branch of Yunnan Tin Co., Ltd. (hereinafter referred to as "Datun Tin Mine")Laochang Branch of Yunnan Tin Co., Ltd. (hereinafter referred to as "Laochang Branch")Kafang Branch of Yunnan Tin Co., Ltd. (hereinafter referred to as "Kafang Branch")Tin Branch of Yunnan Tin Co., Ltd. (hereinafter referred to as "Tin Branch")Copper Branch of Yunnan Tin Co., Ltd. (hereinafter referred to as "Copper Branch")Yunnan Hualian Zinc Indium Co., Ltd. (hereinafter referred to as "Hualian Zinc Indium")

Report Terminology

The report discloses information on the fulfillment of corporate governance, social and environmental responsibilities by YunnanTin Co., Ltd. and its branches and subsidiaries, and the relevant typical cases are sourced from the Company’s affiliates.Reporting Boundary

The information disclosed in this report is obtained from the internal official documents, statistical reports and annualreports of Yunnan Tin Co., Ltd. Data sources used in this report include public data from government agencies, theactual operational data, annual financial data, internal statistical reports of Yunnan Tin Co., Ltd., third-party question-naire surveys, third-party evaluations or interviews, etc. The financial data in this report is expressed in RMB. For anydiscrepancy between this report and the financial statements, the financial statements shall prevail.

Information Source

This report is available in electronic form on the Company’s official website (http://www.ytl.com.cn/) If you have anyquestions or suggestions regarding this report, please email to xygfzqb@ynxy.wecom.work or call 0871-66287901.Access to this Report

About This Report

Wenshan Zinc Indium Smelting Co., Ltd. of Yunnan Tin Co., Ltd. (hereinafter referred to as"Wenshan Zinc Indium")Yunnan Tin New Materials Co., Ltd. (hereinafter referred to as "Yunnan Tin New Materials Co., Ltd.")Chenzhou Yunxiang Mining and Metallurgy Co., Ltd. (hereinafter referred to as "Yunxiang Mining and Metallurgy")

This report is available in both Chinese and English. In case of any discrepancy between the two versions, the Chineseversion shall prevail.Special Notice

2024 Sustainability ReportYunnan Tin Company Limited

In 2024, the global economic landscape remained complex and dynamic, presenting a range of challenges for thenon-ferrous metals sector. Nevertheless, Yunnan Tin has stayed true to its original intention and steadfastly pursuedsustainable development. This year, we made significant strides and garnered valuable experience in advancing ourenvironmental, social, and corporate governance (ESG).In corporate governance, we consistently prioritized high-quality development, optimized our governance framework,strengthened compliance and risk management, and enhanced the transparency and quality of information disclosure.Recognizing that good corporate governance is fundamental to the sustainable development of an enterprise, wecontinuously improved the decision-making framework comprising the General Meeting of Shareholders, the Board ofDirectors, the Board of Supervisors, the Party Committee and the Senior Management, standardized the implementationof the internal governance system, and ensured a scientific and transparent decision-making process. In addition, weattached great importance to communication and interaction with investors. Through high-quality performance briefings,active response to investor concerns, and great efforts to enhance the Company's investment value, we made contributionto the healthy development of the capital market.In environmental management, we adhered to the philosophy of green development, actively responded to the nationalstrategy of carbon peaking and carbon neutrality, and made every effort to build a new pattern of green development.In 2024, we achieved significant results in energy conservation, emission reduction, resource recycling, and ecologicalrestoration. By optimizing production processes and promoting advanced energy conservation technologies, we achievedsteady improvements in energy efficiency. Through enhanced recycling of water resources and stringent controls ofpollutant emission, we actively protected the ecological environment. Our efforts in tailings pond management andmining ecological restoration have contributed positively to biodiversity conservation. We believe that environmentalprotection is fundamental to productivity, and that environmental improvement drives sustainable growth. Movingforward, we will continue to increase our investment in environmental protection, advance the development of greenmines, and make unremitting efforts to realize the synergy between the economy and the environment.In social responsibility, we always adhered to innovation-driven development, and constantly improved the qualityof products and services, to protect the rights and interests of customers. We prioritized employee development, andcreated a good working environment that helps employees achieve personal value and professional growth. Furthermore,we actively engaged in social welfare undertakings, with a focus on areas such as education, healthcare, and ruralrevitalization, aiming to create more value for society. We deeply understand that the success of an enterprise is drivenby not only the creation of economic value, but also its contribution to social welfare. We will uphold responsibility andcollaborate with all stakeholders, making greater contributions to the future of sustainable development.Looking ahead, Yunnan Tin will uphold the ESG principles, integrate sustainable development into every link of theCompany's strategic planning, operation, management, and daily decision-making. We will continuously optimizecorporate governance to enhance our competitiveness, strengthen environmental protection to preserve the naturalenvironment, and actively fulfill our social responsibilities to give back to society. We believe that, through unremittingefforts, Yunnan Tin will steadily advance on the path of sustainable development, create greater value for shareholdersand make greater contributions to society.

Message from the Chairman

Yunnan Tin Co., Ltd. (hereinafter referred to as "Yunnan Tin" or "the Company") is a state-owned listed companycontrolled by Yunnan Tin Group (Holding) Co., Ltd. In 1998, with the approval of the Yunnan Provincial People'sGovernment (Document No.: Yun Zheng Fu [1998] No. 99), the Company was established by the Yunnan Tin Company,Gejiu Xidu Nonferrous Metal Processing Factory, Gejiu Yinguan Tin Arts and Crafts Factory, Gejiu Tin ResourcesIndustrial Company, and Gejiu Juyuan Industrial and Mining Company as sponsors.In October 1999, Yunnan Tin issued 130 million ordinary shares to the public for the first time with the approval of theChina Securities Regulatory Commission. In February 2000, the Company was listed on the Shenzhen Stock Exchange(stock name: "Yunnan Tin"; stock code: 000960), and became the only A-share listed company with a complete tinindustry chain.The Company has an integrated industrial structure that spans the entire supply chain of exploration, mining,dressing, and smelting of non-ferrous metals such as tin, indium, zinc, and copper, with its reserves of tin and indiumresources ranking first in the world. As a leading enterprise in the world's tin industry, the Company has the largesttin production and processing base in China and the longest and most complete tin industry chain in the world, andrepresents the leading level of the world's tin industry.

About UsCompany Profile

Chairman of Yunnan Tin Co., Ltd.

The Company's main products are tin ingots, cathode copper, zinc ingots, die-casting zincalloy, and indium ingots. Yunnan Tin New Materials, a significant holding enterprise of theCompany, offers products such as tin materials and tin chemicals. It has a production capacityof 80 kt/a for tin smelting, 125 kt/a for cathode copper, 100 kt/a for zinc smelting, 50 kt/afor die-casting zinc alloy, and 60 t/a for indium smelting. Yunnan Tin New Materials also hasa production capacity of 43 kt/a for tin materials and 27.1 kt/a for tin chemicals. The "YT"trademark registered in the London Metal Exchange is an internationally renowned brand. Thesales volume of "YT" tin products has consistently ranked first in the world since 2005.

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2024 Sustainability ReportYunnan Tin Company Limited

Corporate Development and ESG Milestones

1883The predecessor of the Company was Gejiu FactoryMerchants Bureau established in the ninth year of thereign of Emperor Guangxu of the Qing Dynasty.

1992

The "YT" Fine Tin trademark was registered at theLondon Metal Exchange (LME).

1998With the approval of the People's Government ofYunnan Province, Yunnan Tin Company, Gejiu TinCapital Industrial Company, Gejiu Xidu Nonferrous MetalProcessing Plant, Gejiu Juyuan Industrial and MiningCompany, and Gejiu Yinguan Tin Arts and Crafts Factoryjointly initiated the establishment of Yunnan Tin Co., Ltd.2000"Yunnan Tin" A-shares were listed on the ShenzhenStock Exchange, with the stock code being 000960.2002

The Ausmelt furnace was completed and put intooperation, increasing production efficiency by 20 timesand setting a world record for the largest tin smeltingcapacity of an Ausmelt furnace.

2005

The output of tin metal reached 42,720 tons, rankingfirst among tin production enterprises.

2006The Company became one of the first manufacturersof raw materials and devices in line with the EU RoHSdirective.2007

The Company won the title of "Top 100 Best InvestorRelations Management in China in 2006".The "YT" brand of Yunnan Tin was rated as a famoustrademark in Yunnan Province.

2008

The Company ranked among the ten most popular listedcompanies in Yunnan Province.The Company won the title of "Excellent Supplier ofBaosteel", and was selected as the sample of the ShenzhenComponent Index for the first time, the Top 100 Enterprisesby the 10th Golden Bull Award for Listed Companies inChina, and the sample stocks of the Shenzhen 100 Index.2009

The Company was appointed by the National StandardizationAdministration of the People's Republic of China to undertakethe work of the Secretariat of the Tin and Tin Alloy WorkingGroup (TC243/SC2/WG2) of the Heavy Metal Sub-TechnicalCommittee of the National Nonferrous Metals StandardizationCommittee, responsible for organizing and mainly undertakingthe task of formulating and revising tin industry standards.2010The Company won the 2010 China's Best Wealth Creation IR(Investor Relations Management) Award.2011

The Company won the Golden Eagle Award at the 7thAnnual Conference of China's Securities Market.

2012The Company was selected as one of the 2012 Top100 Capital Brands of Listed Companies in China.

2013

The Company won the title of "Customer SatisfactionEnterprise" from the China Association for Quality.

2014

The Company won the title of Advanced Collective in theNational Non-Ferrous Metal Industry.

2016The Company became the first listed company completethe market-oriented "debt-to-equity swap" among locallystate-holding enterprises nationwide.

2017

The Company was ranked 190th in theList of China's Top500 Enterprises published by Fortune.2018

The Company implemented the first share repurchase in itshistory.The annual tax payment of the Company hit a record high.The Company won the "National Market Quality CreditA-level User Satisfaction Enterprise" Certificate (AA UserSatisfaction Level).

2019

The Company was included in the FTSE RussellIndex, S&P Emerging Markets Index, and MSCIIndex,with the Company's business philosophy anddevelopment prospects fully recognized by globalauthoritative institutions.

2015

The Company acquired 75.74% of the equity in HualianZinc Indium for a consideration of RMB 3.7 billion.

2020With good business development performance andsocial responsibility, the Company won the title of"Most Socially Responsible Listed Company" on the Listof Chinese Listed Companies with Good Reputation.2021The Company's first performance briefing and 2020Annual Report Performance Briefings were successfullyselected as the "2020 Excellent Practice Case of AnnualReport Performance Presentations of Listed Companies"by the China Association for Public Companies along withother 200 listed companies nationwide.2022

Shenzhen Information Co., Ltd., a wholly-ownedsubsidiary of the Shenzhen Stock Exchange, officiallylaunched the National Securities ESG rating. TheCompany achieved an AA rating and was successfullyincluded in the Shenzhen ESG Benchmark Index andShenzhen ESG Leading Index.

2023

The Company was selected into the list of world-class professional leading demonstration enterprisescreated by the State-owned Assets Supervision andAdministration Commission of the State Council;The Company was awarded the "First Prize of theScience and Technology Award 2022 for China'sNonferrous Metals Industry".2024

The Company won the "2023 ESG Pioneer PractitionerCase" award.The Company signed a cooperation agreement withthe Yunnan Tin Sub-center of the National EngineeringResearch Center of Vacuum Metallurgy.The Company received an "A" rating in informationdisclosure for the 2023-2024 period from the ShenzhenStock Exchange.

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2024 Sustainability ReportYunnan Tin Company Limited

Performance in 2024

CorporateGovernance

EconomicAchievement

EnvironmentalProtection

SocialContribution

0103

0204

Made a total tax payment of RMB 1,803.2286 million

Achieved an operating revenue of RMB 419.73 million

Had4,771 ethnic minority employees

Spent RMB

13.6857 million on employee training, and offered

9,251 training sessions, with an average training duration of

45.24 hours per employee.

Invested RMB

266.7975 million in safety production

Invested RMB

1.9804 million in rural revitalization, with the

number of persons assisted up to 5,491

Participated 1,059 employee volunteer activities, with an averagevolunteer service duration of 216.8 hours per employee

Had115 employees with disabilities

Hired622 veteran employees

Net Profit Attributable to Owners of the Parent Company of RMB

14.44 million.

Invested RMB 316.69 million in environmental protectionGenerated and used80,274 MWh of renewable electricity

Utilized77,972,096 m3 of recycled/reused water

Completed ecological restoration of

110.39 hectares of mine areas

Used1,802,232 MWh of clean energy

Recycled/reused3,008,205 tons of waste

Offered746 training sessions on laws and regulations, typical cases,governance technologies and other knowledge concerning ecological and

environmental protection, with 46,100 person-times of participants.

Organized and participated in 130 investor communications

Received25 one-on-one visits paid by shareholders.Docked with488 institutional and individual investors

Newly obtained 52 patent authorizations, including 20 inventionpatents and32 utility model patents.

Obtained a comprehensive customer satisfaction score of 97.19Invested RMB 397.48 million in R&D

Realized a 100% signing rate of theCommitment to Compliance andIntegrity by suppliers

Answered 167 questions on irm.cninfo.com.cnReceived a total of168 calls from investors

2024 Sustainability ReportYunnan Tin Company Limited

Honorary PerformanceHonorary Performance

Tin Branch Won the Title of the National

"Green Factory"

The Company Won a Number of Scienceand Technology Progress Award

The Company Received the Panorama Investor Relations Gold Award (2023) - ExemplaryInvestment Relations Award, Outstanding ESG Value Communication Award, and Outstanding

Institutional Communication Award

The Company Was Honored the "2024 Outstanding Practice Case in SustainableDevelopment" and the "2023 Best Practice Case of Annual Report Performance

Briefings" from the China Association of Public Companies.

The Company was awarded the title of"Healthy Enterprise in Yunnan Province"

The Company Was Awarded the 2024 Typical Case of BestPractices in Digital Transformation for Listed Companies

The Company Received the 2024 ExcellentCases of Good Practices of the Board ofDirectors in Listed Companies

The Company was Honored the "May Fourth RedFlag Youth League Committee 2023"

The Company received the National May

1st Labor Award

云南锡业股份有限公司入选中国上市公司协会2024年上市公司可持续发展优秀实践案例。

特发此证，以资鼓励！

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2024 Sustainability ReportYunnan Tin Company Limited

"YT" Tin Ingots Was Awarded a Four-star Rating forCustomer Satisfaction by the "China Association

for Quality"

"YT" Zinc Ingots Received a Three-Star UserSatisfaction Rating by "China Association for Quality"

Certificate of Mineral Supply ChainDue Diligence Assessment - Level A

Sustainable development has become a key driving force for the Company to achieve long-term value growth andstable operations. The Company places high importance on the deep integration of business management and ESGprinciples, and incorporates ESG elements into the Company's decision-making process to ensure that they areembedded in every aspect of strategic planning, operational management, and daily decision-making. To furtherenhance the effectiveness and timeliness of the Board of Directors' supervision of sustainable development mattersand strengthen the integration of the sustainable development strategy and the operation policy, the Company hasestablished an ESG management structure with the Board of Directors as the highest responsible body, to coordinateand advance ESG management efforts and improve the Company's sustainability level.

ESG Management

Integration intoCorporate Strategy

Synergy withBusinessDevelopment

Alignment to GlobalStandards

ESG Management Principles

The Company Received the 26th Golden Bull Awardfor Listed Companies - 2023 Golden Information

Disclosure Award

The Office of the Board of Directors WasRecognized as the Excellent Practice Case ofthe Office of the Board of Directors of Listed

Companies for 2024

Honorary Performance

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2024 Sustainability ReportYunnan Tin Company Limited

StakeholdersExpectations and DemandsCommunication and ResponseShareholdersand Senior Man-agement

Economic PerformanceCorporate GovernanceCompliance Risk ControlBusiness Ethics

General Meetings of Shareholders,Board Meetings, Financial Reports,Business Reports, Roadshows, andCommunication with the Company,etc.Governmentand RegulatoryAgencies

Corporate Governance

Business EthicsEnvironmental Management

Waste Discharges

Regular Communication andReporting, Institutional Research,Policy Implementation, InformationDisclosure, etc.

Customers andSuppliers

Innovation and R&DSupply Chain ManagementSupply Chain Due Diligence

Product QualityPrivacy and Data Security

On-site Communication, MarketSurveys, Supplier Training,Transparent Procurement,Customer Satisfaction Surveys, etc.

Employees

Employees'Rights, Interests and BenefitsEmployee Development and TrainingOccupational Health and Safety

Employee Activities, EmployeeTraining, Employee Handbook, etc.

Partners

Supply Chain ManagementSupply Chain Due DiligenceScientific and Technological R&D and

Innovation

Product quality

Industry Conferences, StrategicPartnerships, Exchange Visits, etc.

Community, thePublic, Media,etc.

Ecological Environmental Protection

Community Public WelfareInvestor Relations Management

Community Volunteer Activities,Social Welfare Programs, SocialUndertaking Support Programs,etc.

RelevantInvestment

and ESGManagementReviewGroups

· Formulate ESG strategic plans and ESG-related system policies.· Develop ESG management system and indicator system, and make ESG disclosure· Implement the Company's ESG strategy and ESG responsibilities· Maintain regular communication with stakeholders and regularly identify material ESG topics· Focus on ESG development trends and policy updates· Organize ESG-related training· Implement other matters required by the relevant specialized committees under the Board ofDirectors

Stakeholder CommunicationThe Company attaches great importance to communication and interaction with both internal and externalstakeholders. Through various channels, the Company engages in dialogue with stakeholders to gain a deeperunderstanding of their demands and expectations, strives for their trust and support, and promotes the continuousimprovement of ESG management efforts of the Company.· Act as the highest responsible body for ESG management and disclosure in the Company.· Review and approve the Company's ESG strategic plans and programs.· Review and approve the ESG governance structure and important ESG systems.· Review and approve the Company's ESG-related information disclosures and reports.· Review and approve the public disclosure of material information relating to the Company'sESG governance

· Review and respond to ESG-related risks and major negative ESG events that have a significantimpact on the Company· Conduct research and provide recommendations on the Company's long-term developmentstrategy and major investment decisions.· Conduct research and provide recommendations on major investment and financing plans thatrequire the approval of the Board of Directors· Conduct research and provide recommendations on major capital operations and assetmanagement projects that require the approval of the Board of Directors· Identify risks and opportunities related to the Company's sustainable development, conductresearch, analysis, and risk assessment on ESG-related matters, guide and supervise theformulation and implementation of ESG systems and objectives, and provide decision-makingconsultation, including ESG governance vision, goals, policies, ESG risks, etc.· Organize and coordinate the supervision and inspection of the Company's ESG-related policies,management, performance, and goal progress, and propose corresponding recommendations· Review the Company's strategies, risks, and execution related to ESG management (including

but not limited to focusing on the Company's greenhouse gas reduction, response to climatechange, water resource protection and management, biodiversity, scientific and technologicalinnovation, social contributions) and propose recommendations· Conduct research and provide recommendations on other major matters that affect the

Company's development· Monitor the implementation of the above matters· Handle other matters authorized by the Board of Directors

RelevantSpecializedESGCommittees

ESG Management Structure and Responsibilities

Board of

Directors

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2024 Sustainability ReportYunnan Tin Company Limited

With Impact Materiality Ratherthan Financial Materiality

With DoubleMateriality:

Without Impact Materialityor Financial Materiality

With Financial Materiality Rather than

Impact Materiality:

Supply Chain Due Diligence

Innovation-Driven DevelopmentTailings Management

Environmental Compliance Management

Product and ServiceSafety and QualitySocial ContributionCorporate Governance

ESG ManagementData Security and CustomerPrivacy ProtectionStakeholder Communication

Waste Disposal

Water Resource Utilization

Pollutant Emissions

Energy UtilizationAddressing Climate Change

Rights and Interests ofShareholders and InvestorsCircular Economy

Ecosystem and Biodiversity Conservation

Party buildingEmployees

Anti-Unfair Competition

Human Rights ProtectionDue DiligenceRural Revitalization

CompliantOperationsAnti-Commercial Briberyand Anti-Corruption

Rural Revitalization

Financial Signi?cance

EnvironmentalSocialGovernance

Matrix of Topics ofDouble Materiality

Addressing Climate Change

Pollutant EmissionsWaste DisposalEcosystem and Biodiversity

ConservationEnvironmental Compliance

ManagementEnergy UtilizationWater Resource UtilizationCircular EconomyTailings Management

Rural RevitalizationSocial ContributionInnovation-DrivenDevelopmentSupply Chain Due DiligenceEqual Treatment of Small andMedium-Sized EnterprisesProduct and Service Safety and

QualityData Security and CustomerPrivacy ProtectionEmployeesHuman Rights Protection

Due DiligenceStakeholder CommunicationAnti-Commercial Bribery and

Anti-CorruptionAnti-Unfair Competition

Party BuildingESG ManagementCompliant OperationsCorporate GovernanceRights and Interests ofShareholders and Investors

Analysis of Topics of Double MaterialityIn order to gain a deeper and more accurate understanding of stakeholder expectations and demands, and toenhance the professionalism, relevance, and substance of this report, the Company invites stakeholders throughquestionnaires to select topics of "impact materiality" and "financial materiality" regarding the Company'senvironmental, social, and governance matters. These topics are then disclosed in the report, laying the directionand foundation for the Company's sustainable development system.

Topic Materiality Analysis Process

· Understand company activities and business relationships· Understand the external objective environment· Know about major affected stakeholders

Understanding of the Company's activities and business relationships

· Identify other potentially material topics by reference to peer companies, rating standards, and

other rules based on the topics identified according to the Guidelines· Identify the related impacts, risks, and opportunities of the topics, and summarize them toform the Company's topic pool

Identify ESG topic pool

· Identify impact materiality and financial materiality assessment results through questionnaires,

interviews, etc.· Integrate the evaluation results and form a matrix of topics of double materiality

Assess and rank the materiality of topics

· Confirm or adjust the results of the material topics in conjunction with opinions from the

management· Disclose material topics in the annual ESG report as per the Guidelines

Confirm and report the materiality of topics

Signi?cance

Signi?cance

insigni?cance

Impact Materiality

1718

Advancing Steady ProgressGrounded on Strong GovernanceAdhering to the responsibilities as a state-owned enterprise and the goal of high-quality development, andfocusing on information disclosure, Yunnan Tin will continuously optimize corporate governance, further enhancecommunication with investors, and strive to increase the Company's investment value. The Company will effectivelyachieve the "improvement in both quality and return", to promote the active and healthy development of the capitalmarket. In addition, the Company strictly conducts compliance risk management, continuously builds a clean andhonest environment, and leads the Company's sustainable development with high-quality Party building.

Corporate GovernanceCompliance Risk ControlInvestor Relations ManagementAnti-Commercial Bribery and Anti-CorruptionParty Building

Tin Branch

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Yunnan Tin Company Limited2024 Sustainability Report

Good corporate governance is the cornerstone of sustainable development of an enterprise. Yunnan Tin alwaysmaintains a highly responsible attitude towards shareholders, and continuously improves corporate governancestructure in strict accordance with applicable laws and regulations such as theCompany Law of the People'sRepublic of China, the Securities Law of the People's Republic of China, the Code of Corporate Governance for ListedCompanies. The Company has successfully established a decision-making mechanism centered around the GeneralMeeting of Shareholders, the Board of Directors, the Board of Supervisors, the Party Committee, and the SeniorManagement, to ensure clear division of responsibilities, efficient coordination, and effective governance. Duringthe Reporting Period, the Company standardized the implementation of internal governance systems such as theArticles of Association, the Rules of Procedure for the General Meeting of Shareholders, the Rules of Procedure for theBoard of Directors and the Rules of Procedure for the Board of Supervisors, and standardized the organization of themeetings of the Board of Directors, the General Meetings of Shareholders and the Board of Supervisors to ensure thescientific and transparent decision-making process.

Corporate Governance

Finance Department

Science and Technology Investment

Department

Administrative Office

Party and Mass Work DepartmentParty Committee OfficeHuman Resources DepartmentMine Management CenterSecurities Department (StrategicManagement Department)Safety and EnvironmentalProtection Department (EmergencyManagement Center)Market Operation CenterAudit and Risk Control Department

Operation Management Department

Organizational Structure

Discipline Inspection Group in theCompany Accredited by the DisciplineInspection Commission of Yunnan TinGroup Holding Co., Ltd.

Supervision

General Meeting of

Shareholders

Board ofDirectors

General Manager

Deputy General

Manager

Party Committeeof the CompanyBoard ofSupervisors

Secretary of theBoard of Directors

Performance and

CompensationCommitteeNominationCommitteeStrategy andInvestmentCommittee

Comprehensive Office ofDiscipline Inspection Group

Audit Committee

Powers and Responsibilities of the Board of Directors, theGeneral Meeting of Shareholders, and the Board of Supervisors

The General Meeting of Shareholders is the highest governance body of the

Company. The Company convenes and holds the General Meeting of Shareholders

in a standardized manner in strict accordance with theCompany Law of the People's

Republic of China, the Articles of Association, the Rules of Procedure for the General

Meeting of Shareholders and other relevant regulations and requirements to ensure

that all shareholders, especially minority shareholders, cam enjoy an equal status and

fully exercise their legitimate rights.

General Meeting of Shareholders

The Board of Directors reviews and makes decisions on major matters of the Company

in strict accordance with its powers and responsibilities defined in theArticles of

Association. The notification, convening, voting methods and other procedures of the

meetings of the Board of Directors comply with the provisions of theCompany Law of

the People's Republic of China and the Articles of Association, and the minutes of the

meetings are complete and standardized. All directors are able to work in accordance

with applicable laws and regulations, attend the meetings of the Board of Directors

and the General Meeting of Shareholders, diligently fulfill their duties and obligations,

actively participate in relevant training and learning, familiarize themselves with

applicable laws and regulations, and improve their ability to perform their duties.

Board ofDirectors

The Company strictly implements the election procedures for the Board of Supervisors

in accordance with theArticles of Associationand other applicable regulations. The

Board of Supervisors actively exercises its supervisory responsibilities, reports to the

General Meeting of Shareholders, and supervises the legality of the Company's finances

and the performance of duties by the Company's directors and senior management.

It focuses on key matters such as hedging and connected transactions to effectively

protect the legitimate rights and interests of the Company and its shareholders.Board ofSupervisors

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Yunnan Tin Company Limited2024 Sustainability Report

The Company strives to achieve the effectiveness, independence, diversity and professionalism of the operation ofthe Board of Directors. We endeavor to promote diversity on the Board of Directors in terms of professional skills,industry experience, occupational background, gender and culture in order to promote diversity in development.

Basic Information of DirectorsLiu Luke（Male）Li Shiyon（Male）Zhang Yan（Male）Non-ferrous metalmining, smelting, deepprocessing, supplychain, and enterprisemanagement

Legal affairs andenterprise management

Board Secretaryrelated experience andenterprise managementWu Hongxing（Male）Chen Xiongjun（Male）Li Dening（Male）Non-ferrous metalsmelting and enterprisemanagement

Marketing andenterprise management

Finance and strategicdevelopment

Yuan Rongli（Female）Wang Daobin（Male）Yu Dingming（Male）Accounting, financialeducation, and financialmanagement

Analysis and finance ofthe non-ferrous metalindustry

Legal education andlegal service

In August 2024, to implement the requirements for on-site research by independent directors as set out in theMeasures for the Administration of Independent Directors of Listed Companies, the Company organized a one-week on-site research of its subsidiaries by independent directors. During the research period, the independentdirectors conducted a comprehensive research of the production, operations, financial management, safety,environmental protection, and other aspects of the Company, and based on their professional backgroundsand experience, provided targeted management recommendations to the Company, further enhancing theCompany's governance level.

The Company Organized On-Site Surveys by Independent Directors to Enhance CorporateGovernance

On-Site Surveys by Independent DirectorsOn-Site Surveys by Independent Directors

In 2024, the integrated "internal control, risk management, and compliance governance" management system ofthe Company officially began operations. This new management system has improved the Company's internalcontrol and risk prevention mechanisms, standardized internal governance, and reinforced the awareness of risk andcompliance among all employees, which effectively ensures the compliance and stability of all business activities,and provides strong support for the Company's standardized management, risk prevention, and complianceoperations. The Company continues to fulfill its tax obligations and manage tax-related risks, to ensure itssustainable operations.

Compliance Risk Control

CaseAs of the end of 2024, the Board of Directors had a total of9 directors,including 1 female director,and 3

independent directors.In 2024, the Company Held7 meetings of the Board of Directors,with 100% attendance rate of

the Board members, and 0 directors attending fewer than 75% of the meetings;Convened 7 meetings of the Board of SupervisorsHosted 3 meetings of the General Meeting of Shareholders

Key Performance

2324

Yunnan Tin Company Limited2024 Sustainability Report

Integrated Management System Combining "InternalControl, Risk Management and Compliance Governance"

Internal Control

RiskManagementComplianceGovernance

Lines of Defense Against Compliance Risks

First Lineof DefensSecond Lineof DefenseThird Lineof Defense

BusinessFunctionalDepartmentsComplianceManagementDepartmentsSupervisoryFunctionalDepartments

Internal Control Objectives Internal Control Modes

InternalControlObjectivesInternalControl Modes

Ensure the Company'soperations and managementare legal and compliant

Improve operational efficiencyand effectiveness

Promote the realization ofthe Company's developmentstrategy

Reduce, prevent and control

risks

Safeguard the asset security ofthe CompanyEnsure the Company's financialreports and related informationare true and complete

Based on risk assessment results and with internal control methods that integrate manual control and automatedcontrol, as well as preventive control and detective control, the Company keeps risks within an acceptable rangethrough control measures such as incompatible duties segregation, authorization and approval, accounting system,asset protection, budget management, operational analysis, and performance evaluation.

Risk Identification, Evaluation, and Response ProcessIdentify riskmatters and riskpoints

Review riskmatters and riskpoints

Categorize riskinformation intorisk databases

Prepare riskassessmentquestionnaires basedon risk databases

Summarize andcalculate the riskassessment results,and form a risk mapand a list of major risksUpdate the internalcontrol andcompliance manualbased on updatedrisk databasesDevelop major riskresponse measuresbased on the list ofmajor risks and riskstrategiesEstablish riskmonitoringindicators andimplement riskmonitoring

Collect risk measurementstandards and indicator data,evaluate the indicator values,and give early warnings

Promptlyinitiate responsemeasures

Regularly preparerisk eventmonitoring reports

Conduct riskassessmentsand fill out riskassessmentquestionnaires

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Yunnan Tin Company Limited2024 Sustainability Report

In April 2024, the Company issued a risk management and assessment report based on prior riskidentification and assessment. Through the assessment, the Company analyzed the internal and externalenvironments affecting its business operations, and identified and categorized potential risks in itsbusiness activities. The identified risks were evaluated in two dimensions: the likelihood of occurrenceand the degree of impact. In addition, the Company proposed effective preventive measures against majorrisks, promoted the fulfillment of risk management responsibilities, and improved risk management level.

In June 2024, the Company organized training on "Internal Control, Risk Management, ComplianceGovernance, and Internal Audit". Guided by leading practices and innovative research, the training analyzedthe advanced practices of internal control and risk management in benchmark enterprises, and helpedrelevant personnel in the Company further understand the law and essence of risk management, as well asthe challenges and bottlenecks in the risk management process, to enable them to master comprehensivemethods for addressing major corporate risks and practical capabilities in risk management, internalcontrol, and compliance management.

The Company Conducted Risk Assessments to Improve Risk Management Level

The Company Organized Training on Risk Management to Enhance Practical Capabilities

Case

The Company Organized Training on "Internal Control, Risk Management, Compliance Governance, andInternal Audit"

Case

Tax management is a crucial cornerstone for an enterprise to ensure compliant operations and enhance financialtransparency. The Company attached great importance on tax compliance, viewing it as a crucial link in fulfillingsocial responsibilities and maintaining a good business reputation. Through the establishment of a sound taxmanagement system, we are committed to optimizing tax processes, reducing tax risks, and ensuring the accuracyand timeliness of tax filings.

Tax Management

The Financial ManagementDepartment is the primarydepartment responsible forthe tax management of theCompany. The Company assignstax administrators to perform taxmanagement duties.

The Company collects internal and external relevant informationin a comprehensive, systematic and continuous manner and,taking into account the actual situation, and identifies tax risksin the Company's business activities and processes throughsteps such as risk identification, risk analysis and risk evaluation.We analyze and describe the likelihood and conditions ofrisk occurrence, and assess the impact of risks on our taxmanagement objectives, to determine the priority and strategiesfor risk management.

Tax Management System Tax Risk Management System

Tax Control and Risk Management Measures

In 2024, the Company paid a total ofRMB 1,803.2286 million in taxes.

Key Performance

The Company hires an intermediary agency with the requiredqualifications and professional capabilities to conduct regulartax inspections every year. The intermediary agency will checkwhether the Company has calculated and paid taxes for alleconomic operations conducted by the Company duringthe year in strict accordance with applicable tax laws in atimely and accurate manner, whether tax matters have beenhandled in strict accordance with prescribed procedures, andwhether tax files are managed is in compliance with applicableregulations.The Company dynamically manages tax risks on an annualbasis, and promptly assesses the changes in existing risks andany newly generated tax risks. Based on the results of tax riskassessment and the cost and benefits of risk management,we formulate tax risk response strategies within the overallmanagement and control system, establish an effective internalcontrol mechanism, and reasonably design tax managementprocesses and control methods, to achieve comprehensivecontrol of tax risks.The Company maintains effective communication with thecompetent tax authorities and other relevant units to establishand improve systems for collecting and updating tax policiesand regulations related to the Company's business operations.Tax-related training sessions are offered annually for theCompany's financial personnel to strengthen their taxawareness.

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Yunnan Tin Company Limited2024 Sustainability Report

In 2024, the Company Organized and participated in 130 investor communication eventsDocked with488 institutional and individual investors

Received25 one-on-one visits paid by shareholdersAnswered167 questions on irm.cninfo.com.cnReceived a total of168 calls from investors

Key Performance

The Company always attaches great importance on two-way communication with the capital markets, organizeshigh-quality performance briefings, and conducts investor research and communication activities. With the ongoingsuccess and innovation of the Company's performance briefings in recent years, the Company's performancebriefings have repeatedly won honors such as "Best Practice Case" and "Outstanding Practice Case of PerformanceBriefings" from the China Association for Public Companies. Additionally, the Company has been continuouslyinvited by various institutions to share experiences in performance briefings, marking high recognition from regulatoryauthorities, self-regulatory organizations, investors, and other market players for the Company's remarkableachievements in the management of performance briefings and investor relations.

Investor Relations Management

Improvement

of InvestorRelations

Improve communication efficiency through channels such as irm.cninfo.com.cn, hotlines, on-site surveys, teleconferences, performancebriefings, and generally reply to questions raised on irm.cninfo.com.cnwithin 24 hours.

Regular Analysisof Investors

Form monthly reports through shareholder structure analysis, providefeedback to the Board of Directors and management on investorconcerns, and open up communication channels.

Forms ofInnovativePerformance

Introduce the interpretation of social responsibility reports, the analysisof industry dynamics, messages from stakeholders, the presentation ofvisualized annual reports and other sections through video livestreamingand annual report performance briefings, and adopt digital and virtualreality technology.

Focus onShareholder

Returns

Increase the cash dividend ratio to continuously enhance shareholderreturns; conduct share buybacks and cancellations; and strengthen thecommunication of the senior management and the investor relationsteam with research analysts to enhance the attention of the capitalmarket.

In April 2024, the Companysuccessfully held the 2023 AnnualReport Performance Briefingand Investor CommunicationMeeting through the InvestorRelations Interactive Platform inthe form of a "live meeting + videolivestreaming". The Companyshared with investors aboutYunnan Tin's 2023 operatingresults, industry developments,and the results of Yunnan Tin'sESG efforts, and engaged indeep discussions on investorconcerns. The performance briefingeffectively promoted Yunnan Tin'sintrinsic investment value to thecapital market, communicated theCompany's voice to a wide rangeof investors, listened to investorviewpoints and suggestions, andfully accepted scrutiny from thecapital market.

The Company Held an Annual Report Performance Briefing to Deepen Communication withInvestors

The Company Held an Annual Report Performance Brie?ngand Investor Communication

The Company Held an Annual Report Performance Brie?ngand Investor Communication

Case

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Yunnan Tin Company Limited2024 Sustainability Report

Information Disclosure Evaluation Results from the Shenzhen Stock Exchange

The Information Disclosure Work of Yunnan Tin Received an "A" Rating from the Shenzhen Stock Exchange in 2023-2024

To actively reward shareholders and share them with operating results, the Company, under the premise ofcomplying with the Company's profit distribution policy and ensuring its normal operations and long-termdevelopment, implemented a cash dividend distribution plan to issue a cash dividend of RMB 2.60 (tax inclusive) per10 shares to all shareholders in May 2024, with the total distributed cash dividend amounted to RMB 427,908,507.52(tax inclusive). In January 2025, the Company implemented the interim dividend distribution for the first time byissuing a cash dividend of RMB 1.00 (tax inclusive) per 10 shares to all shareholders, with the total distributed cashdividend amounted to RMB 164,580,195.20 (tax inclusive), fully demonstrating the Company's responsible attitude instriving to reward the market and shareholders.

Returns to Shareholders

Key Honors

In October 2024, the Company received aCircular on the Assessment Results of Information Disclosure by ListedCompanies in 2023-2024from the Shenzhen Stock Exchange, according to which the Company received a "A" rating(the highest rating) in the assessment by the Shenzhen Stock Exchange. According to the evaluation results, only487 out of 2,810 companies listed on the Shenzhen Stock Exchange received an "A" (excellent) rating, accounting for

17.33% of the total number of listed companies evaluated.

Yunnan Tin attaches great importance to the integrity education of employees and management staff at all levels.and continuously strengthens internal governance, to strictly prevent and control fraudulent activities. Throughcontinuously revising and improving the Anti-Fraud Management System of Yunnan Tin Co., Ltd., the Companyclearly designates the comprehensive office of the discipline inspection group as a permanent anti-fraud institutionand urges employees and managers at all levels to strictly abide by the relevant rules and regulations of thesuperior discipline inspection commission and theProvisions on Filing Records of Interference in Enterprise' NormalOperations and Management Activities (for Trial Implementation), to ensure that the Company's operation, andmanagement activities are standardized, honest, and efficient.

The Company has established a dedicated whistleblowingemail and hotline. Any violations or misconduct by Partymembers or officials, if observed, may be reported to theDiscipline Inspection Group in the Company Accredited bythe Discipline Inspection Commission of Yunnan Tin GroupHolding Co., Ltd. (Tel.: 0871-64983008). This protectswhistleblowers' legal rights and provide a solid informationfeedback channel for internal anti-fraud efforts within theCompany.

Anti-Commercial Bribery and Anti-Corruption

Whistleblower Protection System

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Yunnan Tin Company Limited2024 Sustainability Report

To effectively enforce accountability, the Company has stipulated that: Leaders shall be held accountablefor the occurrence of fraud due to negligence within the scope of their supervisory or in-charge work.The Company's management personnel shall also be held accountable for violations during theirdirect operation or participation in decision-making within the scope of their duties. In response to theproblems that have occurred, the affected business units shall carry out a comprehensive assessment andimprovement of internal controls. The Company's business dealings with customers, suppliers and otherrelevant units shall be based on integrity and fairness, and relevant requirements for the Company's allanti-fraud work shall be communicated in a timely manner.

Accountability and Remedies

In accordance with the relevant regulations, the Company shall impose severe punishment for violationsof the anti-fraud management provisions. Those who violate the law shall be handed over to the judicialorgans according to applicable laws. Clear and strict disciplinary measures and handling procedures helpcontinuously improve the Company's governance level, ensure the implementation of all managementsystems, and effectively prevent and curb the occurrence of corruption.

Disciplinary Measures and Handling Procedures

To ensure the long-term validity of the anti-fraud management system, the Company continuouslymonitors and tracks whistleblower information and issues found in internal inspections, and takescorrective measures promptly. The continuous optimization of internal governance systems andsupervision mechanisms empowers the Company to constantly enhance its integrity and self-discipline,creating a clean, positive, and stable operating environment and further strengthening the Company'scompetitiveness in the market.

Continuous Supervision and Governance Improvement

In March 2024, the Company held the Party Integrity Construction and Anti-Corruption Working Conference tocomprehensively implement the anti-corruption deployment for holding companies and further strengthenthe construction of corporate anti-corruption systems. The conference emphasized that in 2024, the Companywould continue to promote the integrated construction of the "Three No-Corruption", deepen politicalsupervision, focus on key areas and critical links, resolutely investigate corruption issues, and strengthenthe line of defense against corruption. At the conference, relevant personnel also signed the Commitment toParty Integrity Construction, reinforcing responsibilities at all levels and promoting the normalization of cleangovernance to provide a solid guarantee for the high-quality development of the Company.

The Company Held a Conference on Party Integrity Construction and Anti-Corruption to Promotethe Normalization of Clean Governance

The Company Held the 2024 Party Integrity Construction and Anti-Corruption Working Conference

Case

In January 2024, Kafang Branch held a kick-off meeting for thewarning and education of Party integrity under the theme of"Integrity Escorts and Leads Clean Kafang to Clean Governance andLong-term Development". The activity aimed to strengthen partyintegrity construction, enhance the awareness of party membersand cadres of integrity and self-discipline through warning,education and case study, and promote the normalization ofintegrity construction. The meeting proposed the establishment ofa "Clean Kafang" mechanism to prevent corruption, and clarifiedthe integrity responsibilities of Party members and cadres. Theactivity helped to promote the Company's integrity cultureconstruction, laying a solid foundation for the sustainable andhealthy development of the Company.

Kafang Branch Conducted Party Integrity Education Activities to Promote the Company's IntegrityCulture Construction

Kafang Branch Held a Kick-o? Meetingfor the Warning and Education of PartyIntegrity

Case

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Yunnan Tin Company Limited2024 Sustainability Report

3433

Decision-Making Framework Comprising the General Meeting ofShareholders, the Board of Directors, the Board of Supervisors, the

Party Committee and the Senior Management

Mutual Independence, Clearly Defined Responsibilities and Powers, Coordinated Checks and Balances,

Effective Governance

PartyOrganization

Setting Direction,Gasping OverallSituation, Ensuring

Implementation.

Two-way Entry, CrossAppointmentConducting Preliminary

Research

General Meeting of

Shareholders

Setting Strategy, Making Decisions,

Preventing RisksBoard of Directors

Planning Operation, Ensuring Implementation, Strengthening Management

Management

Two-wayEntry, CrossAppointment

Board of SupervisorsSupervision

Adhering to the guidance of Xi Jinping Thought on Socialism with Chinese Characteristics for a New Era, theCompany fully practice the spirit of the 20th CPC National Congress and the 3rd Plenary Session of the 20th CPCCentral Committee, and thoroughly studies and implements General Secretary Xi Jinping's important thoughts onparty building. Driven by the goal of fulfilling the key annual tasks of party building and promoting the effectiveintegration of party building with production and operation based on "three lists", the Company is committedto advancing key initiatives such as the study and education of Party discipline and the "Year of Promoting High-Quality Development of Provincial Enterprises through Party Building" event, ensuring their thorough and effectiveimplementation. These efforts continuously strengthen the Party's leadership in supporting and enhancing ourability to tackle critical challenges, deepen reforms, expand markets, and stabilize operations, thus providing a solidpolitical, ideological, and organizational foundation for building the Company into a world-class professional leadingdemonstration enterprise.

Party Building

Powers and Responsibilities of the Party Committee and

Dispatched Discipline Inspection Group

Comprehensivelypromoting corporategovernance

Clarifying the boundaries

of authority andresponsibilities

Defining the legal status ofthe Party organizations

Giving full play to the role of

the Party Committee

Party Committeeand Dispatched

DisciplineInspection Group

In 2024, the Company organized 8 special study sessions for the theoretical center groups of the PartyCommittee

Leading cadres at all levels delivered 62 speeches gave 462 Party lectures

The members of the Party Committee attended6 study sessions for the theoretical center groups of theParty Committee

Key Performance

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Yunnan Tin Company Limited2024 Sustainability Report云南锡业股份有限公司

In June 2024, the Company conducted a supervisory inspection of the Copper Branch's implementationof the "Three Lists" of theImplementation Measures and "Flowchart" for Promoting Effective Integrationof Party Building with Production and Operation (for Trial Implementation). Through field research,exchanges at seminars, reviews of ledgers, and other similar means, the Company urges the Copper Branchto strengthen the implementation of the key tasks of party building, and effectively promotes the deepintegration of party building with production and operation.

The Company Conducted Research and Supervision of the "Three Lists" to Promote the E?ectiveIntegration of Party Building with Production and OperationsThe Company Deepens Learning, Refines Understanding, and Strengthens Implementation toPromote the E?ective and Practical Advancement of Party Discipline Education

The Party Committee of Yunna Tin Launched a Reading Session for Party Discipline Study and Education

In 2024, the Company held a Party committee meeting to make arrangements for the study ofparty discipline. The Company established a dedicated working group specifically responsiblefor In 2024, the Company held a Party committee meeting to make arrangements for the study ofparty discipline. The Company established a dedicated working group specifically responsiblefor this matter and formulated relevant implementation plans. The Party Committee organizedParty discipline study and education in the forms of reading sessions, specialized tutoring,thematic seminars by the Party Committee's Theoretical Study Group, disciplinary lectures,warning education sessions, and summary meetings, while the Party branches conducted Partydiscipline study and education through "Three Sessions and One Lesson", Thematic Party Day,etc. Additionally, the Company comprehensively coordinated and guided party organizations at alllevels through the "five studies" initiative, which requires these party organizations systematicallystudy General Secretary Xi Jinping's important thesis on comprehensively strengthening theParty's disciplinary construction, strictly abide by theRegulations on CPC Disciplinary Action,carefully and effectively carry out education, training and warning for Party members and cadres,integrate Party discipline study and education into daily practice on a regular basis, and promoteParty discipline study and education to be deeper and effective.

Case

The Company Conducted an Inspection of the Party Building at the Copper Branch

Case

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Yunnan Tin Company Limited2024 Sustainability Report

Realizing Sustainable DevelopmentRooted in Environmental ProtectionIn the wave of the era of sustainable development, Yunnan Tin deeply recognizes that the environment is the foundation ofenterprise development and has always adhered to the philosophy of green development. In strict accordance with applicablelaws, regulations, and industry standards, the Company: carries out environmental compliance management; actively respondsto the energy "dual control" policy, optimizes the energy structure, and improves energy utilization efficiency; establishesand improves management systems to strengthen the recycling and protection of water resources; continuously upgradestechnology and equipment, strictly controls pollutant emissions; adheres to the principles of waste minimization, wastevalorization and environmentally sound management, and actively explores waste recycling methods; actively implementscarbon peak and carbon neutrality strategies, formulates plans to address climate change to reduce carbon emissions; sets cleargoals, and achieves significant results in the utilization of resources such as gypsum residue and tailings; actively carries outecological restoration and other work to protect ecosystems and biodiversity. Yunnan Tin is making every effort to build a newpattern of green development through multiple measures, and working tirelessly to achieve the synergy between the economyand the environment.

Kafang Branch Mine Rehabilitation Achievements

Environmental Compliance Management 「"a Topic of Double Materiality"」Energy UtilizationWater Resource UtilizationPollutant EmissionsWaste DisposalAddressing Climate ChangeCircular EconomyEcosystem and Biodiversity Conservation

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Yunnan Tin Company Limited2024 Sustainability Report

In 2024, the Company actively promoted ISO14001 certification. Through internal audits, management reviews,and third-party audits among other multi-dimensional review mechanisms, we organized a comprehensiveinspection and diagnosis on the effectiveness, compliance, environmental target indicator achievement, and majorenvironmental risk control of the operation of the Company's environmental management system. We are committedto identifying and solving problems, promoting the continuous improvement of environmental performance, andconsolidating the foundation for the sustainable development of the Company.

Environmental Compliance Management 「"a Topic of Double Materiality"」

In 2024, Yunnan Tin continuously improved the environmental management system around the environmentalmanagement policy, and further optimized the ecological and environmental protection responsibilities of alldepartments and personnel at all levels in the Company. In line with the national laws, regulations and relevantrequirements on ecological and environmental protection, the Company revised theEcological and EnvironmentalProtection Responsibility List of Yunnan Tin Co., Ltd.and theSupervision and Management Measures for theInspection and Management of Ecological Environmental Protection of Yunnan Tin Co., Ltd.,and published andimplemented the Solid Waste Pollution Prevention and Control Management System of Yunnan Tin Co., Ltd. and theMeasures for the Administration of Tailings Pollution Prevention and Control of Yunnan Tin Co., Ltd.

Measures for the Administrationof Ecological and EnvironmentalProtection of Yunnan Tin Co., Ltd.Measures for the Administrationof Ecological and EnvironmentalProtection Inspection andSupervision of Yunnan Tin Co., Ltd.

Solid Waste Pollution Preventionand Control Management System of

Yunnan Tin Co., Ltd.

Ecological and EnvironmentalProtection Responsibility List of Yunnan

Tin Co., Ltd.Measures for Environmental ProtectionAssessment and Reward/Punishment(for Trial Implementation) of Yunnan

Tin Co., Ltd.Measures for the Administration ofTailings Pollution Prevention andControl of Yunnan Tin Co., Ltd.

Governance

Environmental Policy

Excellence Pursuit, Integrity Adherence,Law Compliance, People Orientation,Energy Conservation, Low Carbon,

Green Development

Existing Environmental Management Policies of the Company

Organizational Structure for Environmental Management

Environmental Management System Certification

Comprehensively responsible for the leadership, organization, supervision,guidance, and coordination of management work related to safety production,ecological and environmental protection, occupational health, and other areas.Safety Production

and EcologicalEnvironmentProtection Committee

Establishing a management framework for ecological and environmental protection,with the Party Committee Secretary and (General) Manager fully responsible forthe work, the Vice (General) Manager in charge of ecological and environmentalprotection specifically responsible, and the environmental protection managementorganization overseeing comprehensive supervision, while business managementdepartments handle specialized management.Branches(Subsidiaries)

Responsible for the Company's daily environmental management work, and forguiding, inspecting, and supervising the environmental management work carriedout by each branch (subsidiary).Safety andEnvironmental

ProtectionDepartment

Having a Deputy Director in charge of environmental protection and environmentalmanagement personnel responsible for the environmental management of theworkshop (pit).Workshops (Pits)

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Yunnan Tin Company Limited2024 Sustainability Report

Building of Green Factory

In early 2024, Yunnan Tin held an annual safety and environmental protection work meeting, thoroughly studied andimplemented Xi Jinping Thought on Ecological Civilization, and implemented the spirit of the relevant meetings.The Commitment to Safety Production, Fire Protection, and Ecological and Environmental Protection were signedby employees at all levels, further enforcing their primary responsibilities for ecological and environmentalprotection. In addition, theOpinions on 2024 Safety and Environmental Protection Arrangement of Yunnan Tin Co.,Ltd.was issued, detailing requirements for aspects such as the management and control of environmental risksand the prevention and mitigation of accident hazards, and relevant plans for advancing safety and environmentalprotection work were formulated and issued for implementation.

In 2024, all units of Yunnan Tin strictly implemented technical documents concerning environmental riskmanagement, such as theGeneral Principles of the Technical Guidelines for the Construction of the Dual PreventionMechanism for Environmental Management, theTechnical Guidelines for the Construction of the Dual PreventionMechanism for Environmental Management - Identification and Classification of Pollution Sources,theTechnicalGuidelines for the Construction of the Dual Prevention Mechanism for Environmental Management – ClassifiedManagement and Control of Environmental Risks, and the Technical Guidelines for the Construction of the DualPrevention Mechanism for Environmental Management – Identification and Management of Potential EnvironmentalHazards.In addition. They dynamically updated the pollution source identification and classification lists and theenvironmental risk classification and control lists, effectively formulated environmental risk management andcontrol measures, regularly conducted the assessment and management of potential environmental hazards, andeffectively prevented and mitigated major environmental risks.

Strategy

Impact, Risk, and Opportunity Management

The Company Held an Annual Safety and Environmental Protection Work Meeting and Signed a Commitment to

Ecological and Environmental Protection Responsibility.

Identify Pollutant Sources

Classify Environmental Risks

Identify Potential Environmental Safety Hazards

Identify Environmental Risks

Implement Classification and Control of Environmental Risk

Classify Pollutant Sources

Formulate Control Measures

Make Continual Improvement

Determine the Criteria for the Identification of

Potential Environmental Safety HazardsConduct Identification and Management ofPotential Environmental Safety HazardsConduct the Operational Evaluation of the Dual

Prevention Mechanism

Identification andClassification ofPollutant Sources

Identification,Classificationand Control ofEnvironmental Risks

ConductIdentificationand Managementof PotentialEnvironmentalSafety Hazards

OperationalEvaluation

Dual Prevention Mechanism and Process for Environmental Risks

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Yunnan Tin Company Limited2024 Sustainability Report

Risk IdentificationRisk Classification

Classification and

Control

Identification Unit: Divide

risks into 5 categories bypollutant sources stated in thePollutant Source Identificationand Classification List, andcomprehensively identifyrisks according to specificprocedures.Situation Clarification:

Clarify three situations:

total emissions exceedinglimits, non-compliantoperation of environmentalprotection facilities, and non-compliant procedures/facilityconditions.

Identification Method: First

systematically identify therelevant systems of pollutantsources and divide them intosubsystems, and then analyzethe key control points with the"4M1E Method" to determineenvironmental risks.

Classification Method:

Determine the risk level withthe multi-factor evaluationmethod (scoring based on 5factors), the direct judgmentmethod, and the expertdiagnostic method.Risk Classification: Classifyrisks into four categories:

Major Risks (Level I), HighRisks (Level II), General Risks(Level III), and Low Lows(Level IV), and prioritizethe determination ofmanagement and controlrequirements for actualrisks that do not matchthe classification resultsaccording to the Company'sactual management needs.

Measure Categories: Cover5 categories: engineering,management, system,emergency response and othermeasures.Measure Formulation:

Target risk sources, formulatemeasures with the "4M1EMethod", and defineresponsible departments.Measure Review: Organizepersonnel to evaluate, andensure all measures arecomprehensive, accurate, andfeasible.Control Requirements:

Conduct differentiated controlfor different risk levels, withhigher control levels for higherrisks. The risks controlledby the upper level are alsomanaged by the lower level.List Preparation: After eachround of identification andevaluation, prepare a riskclassification and controllist and summarize riskinformation.

Copper Smelting FlueGas DenitrificationTechnology ResearchProject of the CopperBranchDust CollectionEquipment RenovationProject for Tin-Copper Paragenic OreProcessing Process inKafang Branch

TechnologicalTransformationProject for QualityImprovementand EfficiencyEnhancement ofDaping Ore DressingWorkshop of HualianZinc IndiumZinc Alloy ExpansionProject of WenshanZinc Indium

125 kt/a CathodeCopper Upgrade andRenovation Project forthe Electrolytic Systemof Copper BranchEngineeringConstruction Projectfor SimultaneousTailings PasteBackfilling System ofDatun Tin Mine

Datachong TailingsPond in Datun Tin Mine

Achievement of Environmental Management Goals for Construction Projects in 2024

The Company, from a strategic height, continuously injects stable funds for environmental protection, with a totalinvestment of RMB 316.69 million in 2024, and is committed to building a model of green enterprises.

The Company strictly implements theLaw of the People's Republic of China on Environmental Impact Assessments,theRegulations on the Administration of Construction Project Environmental Protection,theInterim Measuresfor Environmental Protection Acceptance Inspection Upon Completion of Construction Projects, theMeasuresfor the Administration of Post-Acceptance Environmental Impact Assessment of Construction Projects (for TrialImplementation)and other laws and regulations, and strictly follows the "three simultaneities" of environmentalprotection equipment and facilities during the construction of the project, the environmental impact assessmentof construction projects, and the system for environmental protection acceptance upon project completion. At thefeasibility study stage of project construction, regarding ecological and environmental protection measures as animportant basis for feasibility studies, we actively promote environmental management of construction projectsin accordance with applicable laws, and enhance supervision and guidance before, during, and after the projectconstruction to ensure that construction projects are legally compliant.

Metrics and Targets

Compliance Management

ProjectsCompleting EIA

Filing

Projects ObtainingEIA Approval

Projects PassingEnvironmentalProtection Acceptanceupon Completion

Projects CompletingPost-Assessment EIA

Classification and Control Mechanism against Environmental Risks

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Yunnan Tin Company Limited2024 Sustainability Report

In 2024, the Company continuously optimized and improved its emergency management system for environmentalemergencies, stipulating provisions for the preparation of emergency response plans, environmental riskassessment, emergency material investigation, the filing, management and evaluation of emergency response plans,training on emergency response plans, and relevant drills. Additionally, each production unit of the Company hasformulated emergency drill plans for sudden environmental incidents, and regularly organized emergency plantraining and drills for sudden environmental incidents, effectively preventing and controlling the occurrence of suchincidents.

In 2024, to actively respond to the national call for ecological and environmental protection, Yunnan Tin organizedtheoretical studies through the central group of the Party Committee. Leaders and cadres were deeply engaged inlearning the thought on ecological civilization, and played a leading role. Special training sessions were offered,and environmental protection experts were invited to give detailed explanations of applicable laws, regulationsand technologies related to pollution control. External training was also organized to allow employees to learn fromadvanced environmental protection experiences in other regions. Through a series of trainings, the ecological andenvironmental protection awareness among employees at all levels of the Company was significantly improved,laying a solid ideological foundation for the Company to practice the philosophy of green development in productionoperations, reduce environmental pollution risks, and achieve sustainable development.

Emergency ManagementEnvironmental Protection Promotion Initiative

In 2024, Wenshan Zinc Indium, Hualian Zinc Indium, Datun Tin Mine and other units jointly carried outgovernment-enterprise joint drills with local governments. The production units of the Company carriedout 114 trainings on the emergency response plan and emergency management for environmentalemergencies, with a total of 3,215 participants. They also organized 85 emergency response drills forvarious types of environmental emergencies such as leakage of exhaust gases, tailing ponds rolloverwading or dam failure, with 1,859 participants in the drills. The emergency drills not only tested andimproved the emergency plans, but also enhanced the ability of government and enterprises to respondto environmental emergencies in a coordinated manner, strengthened the level of emergency responseof the relevant personnel, and built a solid foundation for effectively preventing and responding toenvironmental risks and safeguarding ecological and environmental safety.

In 2024, to strengthen the legal awareness of all employees for environmental protection, the Companyinvited a professional lawyer to offer training on laws and regulations concerning environmentalprotection. Through clear and engaging explanations combined with real and vivid case studies, thelawyer made complex legal knowledge accessible and understandable. More than 170 employees activelyparticipated in the training, including senior executives, key leaders from all units and departments,as well as environmental management personnel and technical experts. This training not only helpsemployees to grasp the key points of environmental protection regulations in a timely manner, toavoid legal risks in production and operation, but also improves the Company's overall environmentalprotection management level, and contributes to the green and sustainable development of theCompany.

Emergency Drills to Build a Line of Defense against Environmental Emergencies

An Environmental Lawyer was Invited to Strengthen the Line of Defense for Legal Compliance

Knowledge Empowerment by Providing Environmental Protection Handbooks to Enhance AwarenessAmong All Employees

Case

Case

Case

Handbook of the Ecological andEnvironmental Protection Knowledgeof Yunnan Tin

Training on Emergency Response PlansTraining on Emergency Response Plans

Emergency Drill for Gas LeakageEmergency Drill for Tailings Pond

In 2024, no major sudden environmental incidents occurred in any units of the Company, and no environmentalevent penalties were imposed on the Company.

In 2024, the Company conducted in-depth research onthe complex business processes of mining, dressing,smelting, etc. We comprehensively sorted out theprovisions of laws and regulations on ecological andenvironmental protection, from the national coreenvironmental protection laws to local industry-specificregulations, for environmental issues that may arisein production. We also compiled the Handbook ofEcological and Environmental Protection Knowledgein the Yunnan Tin and distributed it to all units ofthe Company, encouraging employees to studyindependently during their spare time through online and offline learning channels. The Handbook of theEcological and Environmental Protection Knowledge effectively enhanced the environmental protectionawareness of personnel at all levels in a concise and easy-to-understand manner, further supporting theCompany's compliance in production and contributing experience to the industry's green development.

Key Performance

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Yunnan Tin Company Limited2024 Sustainability Report

In June 2024, in alignment with Xi Jinping Thought on Ecological Civilization and relevant conferencedirectives, as well as the guidelines of the Ministry of Ecology and Environment, the Company, based onits own operation needs, organized a series of promotional activities for the "June 5 Environment Day", todeepen in-depth study of relevant thoughts, strengthen green awareness, enhance public outreach, fosteran ecological culture, and encourage employee to participate in ecological civilization initiatives. The"June 5 Environment Day" event helped to guide the whole company to practice the philosophy of "lucidwaters and lush mountains are invaluable assets", mobilize employees and their families to participate inthe construction of a beautiful China, create a good ecological and environmental protection atmosphere,and promote the sustainable development of the Company.

In 2024, the Company made significant efforts to improve the factory environment, aiming to make itsworkspaces clean, comfortable, and healthy. Employees actively participated by sweeping factory roads,removing surface stains, clearing weeds around premises to refresh the surroundings, and trimminggreenery to enhance the landscape aesthetics. These initiatives led to a noticeable transformation ofour factory environment, significantly improving the workspace while demonstrating the Company'scommitment to employee well-being and a high-quality working environment, helping to shape a positivecorporate image and promoting harmonious development.The Company Promoted June 5 Environment Day to Build a New Path for Green DevelopmentTogether

The Company Improved the Factory Environment to Build a Beautiful Yunnan Tin

Case

Case

The Company Promoted "June 5 Environment Day" by Going into Communities andOrganizing Environmental Protection Product DIY Contests

The Company Organized Tree Planting Activities for the "June 5 Environment Day"

Employees Actively Participated in Building A Beautiful Yunnan Tin

Employees Actively Participated in Building A Beautiful Yunnan Tin

In 2024, the Company's subsidiaries, branches, and workshops (pits) offered a total of746 training sessions onlaws and regulations, typical cases, and governance technologies for ecological and environmental protection, with

46,100 person-times of participants.

Training on Ecological and Environmental Protection Knowledge

Key Performance

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Yunnan Tin Company Limited2024 Sustainability Report

Yunnan Tin, in accordance with relevant management requirements,integrates energy management into theQuality, Environmental,Occupational Health and Safety, Energy Management System,achieving integrated management. Through continuous annualinspections and internal audits, we ensure that the system is controlledand operated properly. In 2024, the Company formulated theMeasuresfor the Administration of Energy Conservation, and included thecomprehensive energy consumption of smelting products into theannual appraisal system as a key appraisal index in accordance withGB25323-2023 The Norm Of Energy Consumption Per Unit Production

Energy Utilization

ISO 50001 Energy ManagementSystem Certification

The Company conducted the "Research on the Application of High-Voltage Variable-Frequency SpeedRegulation Technology for MBY2740 Rod Mill", and completed the renovation of the first set of high-voltagevariable-frequency speed-regulated rod mills.The Company achieved more than one function optimization, energy conservation and consumptionreduction, with the annual electricity saving per unit of equipment being 15%.

The Company continued to promote the renovation for the power generation from waste heat of thesmelting process, and the annual self-generated electricity amounted to 80.274 million kWh for gridconnection or self-consumption, effectively improving the energy utilization rate.

Currently, the clean/renewable energy used by the Company mainly includes hydropower, electricity fromwaste heat, electricity from waste energy, natural gas, etc. Electricity is the primary energy consumed bythe Company, and approximately 84% of total electricity consumption by the Company is clean electricity.Among them, waste heat and waste energy power generation account for 4.8% of clean electricity.In 2024, the Company completed a portion of tailings pond projects and other PV power generationprojects. It is expected that after these projects are put into operation in 2025, the additional powergeneration capacity will be 18 million kWh.

Upgrading with Energy-Efficient Technology

Waste Heat Power Generation

Utilization of Clean/Renewable Energy

Application and Promotion of Permanent Magnet MotorThe Company conducted the "Research on the Application of High-Voltage Variable-Frequency SpeedRegulation Technology for MBY2740 Rod Mill", and completed the renovation of the first set of high-voltagevariable-frequency speed-regulated rod mills.The Company achieved more than one function optimization, energy conservation and consumptionreduction, with the annual electricity saving per unit of equipment being 15%.

With the advancement of the national strategy of "carbon peaking and carbon neutrality", Datun Tin Mineintroduced 2 new-energy loaders to be used for ore loading, supply, and short-distance ore transfer atthe raw ore yard, to address problems of fuel-powered loaders such as high energy consumption, highmaintenance costs, and significant pollution. The new-energy loaders have significant advantages interms of power performance, environmental protection, and maintenance, and demonstrate remarkableresults after being put into use: significant reduction in energy cost reduction, at least 1,200 yuan per day

In 2024, to implement the "Three-Year Cost Reduction and Efficiency Improvement" Action Plan, theCompany addressed the high energy consumption and poor control stability of refining furnaces andcrystallizers by replacing the infrared heating with original resistance heating, and used a PID-controlledthermostat to conduct energy-saving transformations on the crystallizer's tank body, feed pot, and othercomponents. The renovated crystallizers showed remarkable results: the capacity per unit increasedby more than 10%, the comprehensive electricity consumption decreased by more than 20%, and theelectricity cost decreased by nearly RMB 0.2 million per year. This technological transformation reducedproduction costs and improved production efficiency, providing strong support for the realization of theCompany's cost reduction and efficiency improvement goals.

New-Energy Loaders Drive Energy Conservation, Bene?t Creation and Green Development

Renovation of Re?ning Furnaces and Crystallizers for Energy Conservation Unlocks New Momentumfor Cost Reduction and E?ciency Improvement

Case

Case

New-energy Loaders

Of Nonferrous Heavy Metals Metallurgical Enterprises. Through measures such as continuous optimization ofproduction processes and effective implementation of energy conservation technologies, we ensured the steadyimprovement in energy utilization efficiency and the realization of refined and scientific energy management,contributing to the achievement of our sustainable development strategic goals.

Key Optimization Initiatives for Energy Conservation and Consumption Reduction in 2024

compared to fuel-powered loaders; easier maintenanceoperations, lower maintenance costs; long servicelife, reduced equipment renewal costs; avoidance ofenvironmental risks, promotion of the transformationto clean energy structure, and a reference for the greendevelopment of the industry.

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Yunnan Tin Company Limited2024 Sustainability Report

In 2024, to promote green and high-quality development, the Company implemented a project to recoverwaste heat from the condensate water in the copper smelting system and the wastewater discharged fromboilers. With the condensate water in the steam pipeline and the wastewater discharged from medium-pressure boilers as the sources of waste heat, the Company transformed the flash distillation recoveryequipment, preheated the desalinated water with the flash distillation steam, and recovered condensatewater through a condenser. The project has shown significant results after being put into operation. In2024, it reduced low-pressure steam usage by 1,257 tons, desalinated water usage by 9,303 tons, andgenerated 143,300 kWh of electricity, which not only improved energy utilization efficiency, but alsoreduced operating costs and enhanced the Company's green competitiveness.

Waste Heat Recovery Creates Economic Bene?ts and Contributes to Green Smelting

Case

As per applicable regulations and requirements such as theMeasures for Cleaner Production Audit and the Lawof the People's Republic of China on the Promotion of Clean Production, the Company continues to carry outmandatory cleaner production audits. Currently, the Company's branches (subsidiaries), namely, Datun Tin Mine,Kafang Branch, Copper Branch, Tin Branch, and Hualian Zinc Indium, have all passed the cleaner production auditand acceptance.In response to the policy for the dual control of total energy consumption and energy intensity, the Companyattaches great importance to the development and utilization of renewable energy, continues to formulate rigorousannual energy management objectives and plans, and includes total electricity consumption, as the main energyconsumption, into the annual energy plan, with the planned total electricity consumption being 2 billion kWh.In terms of electricity procurement strategy, the Company has adopted a market-oriented operation mode, andpurchases electricity from external organizations in a uniform way. 80% of the purchased electricity is from cleanenergy power generation, and 20% is from coal-fired power generation. This optimizes the energy structure andenhances the proportion of green energy.

IndicatorUnit2024Comprehensive EnergyConsumption

tce399,079Energy Usage Intensitytce/10,000 yuan of revenue0.10Direct Energy Consumptiontce138,229Including: Coalton127,556Including: GasolineLiters258,060Including: DieselLiters28,921,368Including: Natural gasm

9,063,900Indirect Energy Consumptiontce260,850Including: Electric powerMWh2,122,459Total purchased electricityMWh2,042,185Consumption of Self-generatedRenewable Electricity

MWh80,274Clean Energy ConsumptionMWh1,802,232Clean Energy Usage Rate%57.97

Energy Consumption in 2024

From 2023 to 2024, Laochang Branch, Datun Tin Mine, and Kafang Branch implemented an undergroundventilation system optimization project for the mines. They optimized ventilation routes, reduced systeminstallation power, and replaced high-consumption, low-efficiency motors with Class-I energy-efficientmotors, to achieve energy conservation and consumption reduction. In July 2024, the project passedinspection and acceptance. The three mines reduced the installed power of the ventilation systemby a total of 3,133 kW, the actual power consumption of fan operation was reduced by 20%, and theannual power consumption was reduced by 9.28 million kWh. This effectively reduced the Company'soperating costs, improved energy utilization efficiency, and provided strong support for the sustainabledevelopment of the mines.

The Optimization and Upgrading of the Ventilation System Opens a New Chapter for EnergyConservation in MinesCase

In 2024, the Company's comprehensive energy consumption in smelting decreased by 2.5% when compared withthat in 2023, realizing the goal of achieving a1% decrease in the comprehensive energy consumption of tin, copperand zinc smelting in 2024 when compared to 2023 as set out in the Three-Year Cost Reduction Plan.

Energy Conservation Goal for 2025: In 2025, the company's comprehensive energy consumption per unit of smeltingproduct will be controlled to a level better than the national first-grade standard.

Key Performance

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Yunnan Tin Company Limited2024 Sustainability Report

Key Performance

In 2024, No significant deficiencies were observed in the Company's environmental monitoring plans and riskmanagement measures;No environmental issues such as excessive emissions or major spills occurred in theCompany, andNo penalties due to pollutant discharge were imposed on the Company.

Yunnan Tin is actively evolving into a national water-saving enterprise. The Company carries out daily inspectionsaccording toGBT7119-2018 Evaluation Guide for Water-saving Enterprises, strengthens water-saving publicity, andformulates a series of water resource management systems such as theMeasures for the Administration of WaterSupply and Drainage. With management focus on water conservation, water source protection, and the preventionand control of risks in water consumption, the Company included the goal of achieving a 1% continuous decrease inwater consumption per unit product into the annual assessment in accordance with the requirements of theThree-Year Cost Reduction Plan. The Company reduces new water consumption at the source by optimizing productionprocesses and equipment; strengthens the comprehensive utilization of mine inflow water to achieve water resourcerecycling; regularly inspects water pollution risks, and promotes the rational use of water resources and waterenvironmental protection in an all-round manner.

Yunnan Tin attaches great importance to wastewater and waste management, and regards it as a key for sustainabledevelopment. In 2024, the Company strictly implemented environmental impact assessment and pollutant dischargepermit management systems, completed the application for pollution discharge permits, and ensured that pollutantconcentrations met emission standards, and that the total discharge volume complies with permit requirements. Wealso continuously optimized internal governance rules, executed in-house standards stricter than industry standards,and implemented special emission limits for subsidiaries in key areas. In addition, the Company developed ascientific wastewater and waste monitoring plan, adopted diversified monitoring methods, built prevention andcontrol facilities according to environmental impact assessment requirements, and took multiple measures toenhance wastewater and waste management levels, actively practicing the green development philosophy.

Water Resource UtilizationPollutant Treatment

Key Performance

In 2024, the Company continued to carry out water-saving and consumption reduction measures and increased therecycling of water resources. With the decrease in water resource usage intensity, the water resource recycling rate ofthe Company has improved year by year.

1.8

1.6

1.4

1.2

95.0%

94.5%

94%

93.5%

93%

92.5%

20222022

1.74

93.2%

1.84

94%

1.42

94.5%

2023202320242024Water Resource Usage Intensity in the PastThree Years (tons/10,000 yuan)

Water Resource Recycling Rate in the Past

Three Years (%)

指标单位202420232022

Total water consumptionton4,569,1505,220,7425,487,423Total Consumption of Fresh Waterm

4,569,1505,220,7425,487,423Recycled/Reused Waterm

77,972,09682,097,30876,128,121Water Resource Utilization in 2024

The emission of exhaustpollutants meets applicable

standards.

Wastewater is dischargedaccording to the license, domesticsewage is discharged into theurban sewage treatment facilities,and production wastewater is not

discharged.

Solid waste is disposed ofaccording to regulations, with adisposal rate of 100%Achieved

Achieved

Achieved

The wastewater pollutants generated by the Company are mainly production wastewater produced during the oredressing process, the smelting process, and deep processing units, with the primary water pollutants being chemicaloxygen demand (COD), ammonia nitrogen, heavy metals, etc.In the principle of "diverting clean water from waste water and separating rainwater from sewage", the Companysets up rainwater pipelines and sewage pipelines for the classified collection of various types of wastewater, andbuilds sedimentation tanks, initial rainwater collection tanks, thickeners, production wastewater treatment systems,domestic wastewater treatment systems, backwater pump stations, and other wastewater collection and treatmentfacilities to classify and treat different types of wastewater.

Wastewater

Pollution and Waste Management Goals and Achievements in 2024

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Yunnan Tin Company Limited2024 Sustainability Report

The Company's Wastewater Discharge Units Apply for Pollutant Discharge Permits in Accordance with Applicable

Laws

Upgrading of Groundwater Monitoring SystemEach mining unit evaluated the groundwater monitoring wells at the tailings ponds and waste rock yards inservice, and upgraded unreasonable monitoring systems, to ensure the effectiveness of groundwater monitoringResearch on Deep Treatment of Tailings WastewaterHualian Zinc Indium conducted a study on the deep treatment of wastewater discharged from tailing ponds:

Industrial trials of composite water treatment agents and COD removal agents were carried out at the TongjieDagou Tailings Pond; industrial trials of biological agents and high-efficiency fluorine removal agents wereconducted at the Nanjia Tailings Pond, which provided technical reserves for the Company's deep treatment oftailings wastewater.Diversion of Clean Water from Waste Water in Tailings PondHualian Zinc Indium completed the Dongbang Construction Project for the Diversion of Clean Water from WasteWater in Nanjia Tailings Pond, which guided the watershed from mountains in Dongbang into the downstreamof the tailings pond, reducing the water inflow to the tailings pond and lowering wastewater discharge.

Rainwater-Sewage Separation in Hazardous Waste Slag YardTin Branch completed the preliminary construction for the closure of the hazardous waste slag field, carriedout feasibility studies and closure design, shaped the top slag heap as designed, and covered it with animpermeable membrane to achieve rainwater-sewage diversion, reducing rainwater infiltration and leachategeneration.

Optimization Measures for Wastewater Treatment in 2024

IndicatorUnit202420232022

Total Wastewater Discharges10,000 m

137117265Including: Total Industrial Wastewater10,000 m

137117265Including: Total Domestic Wastewater10,000 m

---Chemical Oxygen Demand (COD)kg24,35117,77551,250Biochemical Oxygen Demand (BOD)kg///Ammonia Nitrogen (NH3-N)kg2198077,586Total Nitrogen (TN)kg4,1412,38310,206Total Phosphorus (TP)kg4552123Total Arsenickg61657Suspended Solids in Wastewaterkg12,3646,75728,846

Wastewater Discharge in 2024

The Company's Waste Gas Discharge Units Apply for Pollutant Discharge Permits in Accordance with Applicable Laws

The Company's waste gas pollutants are particulate matter-containing waste gases generated during the ore dressingprocess and the material storage and transportation process, as well as smelting gases containing pollutants such assulfur dioxide, nitrogen oxides and heavy metals that are generated during the metal smelting process.In strict compliance with theEnvironmental Protection Law of the People's Republic of China, Self-monitoringTechnology Guidelines For Pollution Sources—General rule, and other laws, regulations and standards, the Companyformulates a waste gas monitoring plan. The quality of monitoring is ensured through both self-monitoring andoutsourced monitoring. Moreover, the Company actively builds air pollution control facilities. For areas prone to dustemissions, measures such as using gas collection hoods and spraying water for dust suppression are implemented toreduce dust and unorganized waste gas emissions, actively promoting air pollution control efforts and contributingto a better atmospheric environment.

Waste Gases

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Yunnan Tin Company Limited2024 Sustainability Report

Upgrading of Dust Removal Facilities

Copper Branch and Hualian Zinc Indium replaced the original bags in bag filter with ultrafine fiber bags; KafangBranch used a high-efficiency wet dust remover to replace the original water curtain dust collector to furtherreduce the particulate emissions in the waste gas and ensure that the particulate matter meets the industry'sspecial emission limits.

Upgrading of Dust Removal Facilities

Wenshan Zinc Indium addressed the dust issues at the leaching slag transfer warehouse and transfer slag yardby increasing the height of the surrounding enclosure and adding roller doors, controlling the generation andemission of dust, and further improving the surrounding environment.Tin Branch completed the preliminary work for closing and sealing the hazardous waste slag yard, conducteda feasibility study and closure design for the hazardous waste slag yard, and covered the top of the slag heapwith an impermeable membrane according to the closure design requirements, effectively controlling thegeneration of dust.

Denitrification of Off-Gas from Acid Production Process

Copper Branch and Hualian Zinc Indium replaced the original bags in bag filter with ultrafine fiber bags; KafangBranch used a high-efficiency wet dust remover to replace the original water curtain dust collector to furtherreduce the particulate emissions in the waste gas and ensure that the particulate matter meets the industry'sspecial emission limits.

Optimization Measures for Waste Gas Treatment in 2024

IndicatorUnit202420232022

Total Exhaust Gas Emissions10,000 m

736,311757,900994,090Nitrogen Oxides (NOx) Emissionskg201,954230,061237,357Sulfur Oxides (SOx) Emissionskg127,653122,079189,630Volatile Organic Compounds (VOCs) Emissionskg///Particulate Matter (PM) Emissionskg39,20147,79656,790Ammonia (NH3) Emissionskg///Hydrogen Chloride (HCL) Emissionskg///Arsenic Hydrogen (AsH3) Emissionskg///Phosphine (PH3) Emissionskg///

Air Pollutant Emissions in 2024

The Company's units engaged in hazardous waste operationin accordance with applicable laws applyHazardous WasteManagement License

The solid wastes generated by the Company are mainly waste rock and tailings from the mining process, as well assmelting slag and arsenic-containing hazardous wastes from smelting flue gas purification and wastewater treatmentin the smelting process.In strict compliance with regulations and policies such as the Environmental Protection Law of the People's Republicof China and the Law of the People's Republic of China on the Prevention and Control of Environmental Pollution bySolid Wastes, the Company, aiming to achieve waste minimization, waste valorization and environmentally soundmanagement, controls the quantity at source through technical research, strengthens the utilization of solid waste

Waste Disposal

resources and promotes the management ofhistorical slag heaps to prevent and controlthe risk of pollution. In 2024, the Companyintroduced the Solid Waste PollutionPrevention and Control Management Systemand the Measures for the Administration ofTailings Pollution Prevention and Control tofurther standardize solid waste management,strengthen preventive measures, ensure thesafety of tailings pond environments, andactively promote solid waste managementefforts.

By formulating and implementing the Measures for the Administration of Solid Waste, the Company has formulatedmanagement measures for the entire process of solid waste from generation to disposal, and stipulated pollutionprevention and compliance management requirements for solid waste management plans, labeling, ledger records,transfer management, storage and landfill pollution control, IoT construction, emergency management, etc.

Management of Wastes

S/NUnitHazardous WasteDisposal Method

1Tin Branch

Centrifugal slag, aluminum slag, sulfur slag, acid sludge, electric

furnace smelting slag, charcoal slag, tin smelting soot

Self-utilizationArsenic-containing soot, anode sludge, waste mineral oil, zinc

carbonate, cadmium slag

OutsourcedutilizationCalcium sulfate slag

Self-landfill

or outsourced

disposalWaste salt, waste contaminants, waste asbestos, waste chemicals,

waste resins

Outsourced

disposal

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Yunnan Tin Company Limited2024 Sustainability Report

Main Hazardous Waste and Disposal Methods

S/NUnitHazardous WasteDisposal Method

2Copper Branch

Black copper sludge, anode sludge, silver-splitting slag, copper

fume

Self-utilizationCopper fume, lead filter cake, waste catalyst, waste mineral oil,

waste lead storage batteries

OutsourcedutilizationNeutralization slag, arsenic filter cakeSelf-landfillSalt-containing sludge, arsenic sulfide residue, waste insulation

cotton, waste contaminants

Outsourceddisposal

Wenshan ZincIndium

Zinc scumSelf-utilizationLeaching slag, copper sinking slag, copper concentrate, cobaltconcentrate, acid sludge, waste mineral oil, waste lead batteries

OutsourcedutilizationArsenic sulfide residue, contaminated waste, online monitoring

waste liquid, and waste asbestos felt

Outsourceddisposal

Laochang Branch,

Kafang Branch,Datun Tin Mine,Hualian Zinc Indium

Waste mineral oil, waste lead batteries

OutsourcedutilizationWaste lubricating oil, waste contaminants, laboratory waste liquid

Outsourceddisposal

Yunxiang Miningand Metallurgy

Arsenic-containing soot, waste mineral oil, copper slag, aluminum

slag

OutsourcedutilizationSludge from the sewage station, waste liquid under online

monitoring

Outsourceddisposal

S/NUnitHazardous WasteDisposal Method

1Tin BranchWater-quenching slagSelf-landfill or outsourced utilization2Copper Branch

Slag selection tailingsSelf-landfill or outsourced utilizationDesulfurization gypsum slag, gypsumOutsourced disposal3Wenshan Zinc Indium

Gypsum slag

Self-utilization or outsourced

utilizationNeutralization slagSelf-landfill or outsourced disposal

Laochang Branch, KafangBranch, Datun Tin Mine,Hualian Zinc Indium

TailingsSelf-landfillWaste rock

Self-utilization or outsourced

utilization

Yunxiang Mining andMetallurgy

Desulfurization gypsum slagOutsourced disposalMain Non-Hazardous Waste and Disposal Methods

In 2024, the Laochang Branch adopted different disposal measures for general solid waste and hazardouswaste generated from mining and ore dressing: Waste rock from underground excavation was usedfor filling underground mined-out areas, processed into concrete materials and road materials, andtailings were stored in the tailings pond. Hazardous waste such as waste mineral oil was placed intemporary storage and storage bins and was disposed of or recycled by qualified companies. Throughthe implementation of these measures, the Company filled a total of 31.72 million tons of waste rock intounderground mined-out areas, reducing the stockpile in the waste dumps and extending the service life of3 waste dumps. The required construction materials were supplied in a timely manner, reducing costs andenvironmental risks, and achieving resource recycling.

Multiple Measures to Promote Mine Waste Management and UtilizationCase

Yangbadi Tailings Pond for Stockpiled Tailings

Storage Bin for Hazardous Waste

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Yunnan Tin Company Limited2024 Sustainability Report

In 2024, the Company continued to strengthen hazardous waste management and pollution preventionefforts. We actively organized professional teams to travel to Sichuan, Guizhou, Shandong, Zhejiang,and other regions, conducting on-site visits to local enterprises. The team explored advanced pollutioncontrol technologies and the standardized management of hazardous waste disposal, gaining detailedinsights into the operation principles of advanced equipment, the application of innovative technologies,and efficient management processes. This learning experience helps the Company accumulate valuableknowledge, lays the foundation for the Company's compliant disposal of hazardous waste, and enhancesthe Company's pollution prevention capabilities. It also helps the Company establish a scientificallyefficient waste and sewage management system to improve pollution prevention capacity.

In 2024, the Copper Branch focused on waste and sewage management and conducted a series of keytrainings. In the training on IoT construction for hazardous waste, employees learned in-depth how to useIoT technology to achieve real-time monitoring and information management of the entire hazardouswaste process, and improve regulatory efficiency and accuracy. The training on the online monitoring ofpollution sources focused on the operation of advanced monitoring equipment, data interpretation, andhandling abnormal situations to ensure the timely and accurate grasp of pollutant emission dynamics.

Learning from Experience Across Multiple Locations for Waste and Sewage ManagementTraining on Pollution and Waste Management to Assist Ecological Protection

CaseCase

Training on IoT Construction for Hazardous Waste

In-depth learning on Waste and Sewage Management at Multiple Enterprises

Training on Online Monitoring of PollutionSources

Training on Standardized Management ofHazardous Waste

The training on standardized management ofhazardous waste provided detailed explanationson relevant laws, policies, ledger establishment,safe storage, and other key points. Thesetrainings help the Company meet environmentalcompliance requirements, reduce legal riskscaused by improper waste management, improvewaste treatment levels, minimize environmentalpollution, and assist in ecological protection.

IndicatorUnit202420232022

Total Waste Generationton55,705,40658,406,20030,034,600Including: Total HazardousWaste

ton206,838216,300232,700Including: Total Non-Hazardous Waste

ton55,498,56958,189,90029,801,900Hazardous Waste Density

tons / 10,000yuan of revenue

0.050.050.04Non-Hazardous Waste Density

tons / 10,000yuan of revenue

13.2213.745.73Total Recycled/Reused Wasteton3,008,2051,135,6002,950,700Waste Recycling Rate%5.401.949.82

Waste Emissions in 2024

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Yunnan Tin Company Limited2024 Sustainability Report

In 2024, in response to the challenges of acidic wastewater treatment, the Company initiated the Researchon the Application of the Minimization Technology to Arsenic-Containing Slags for Copper Smelting AcidicWaste Treatment of Yunnan Tin. This project aims to build an acidic sulfurization treatment system toreplace the original lime slurry system, using methanol catalytic cracking for hydrogen production andother processes to treat acidic wastewater. The project has shown significant results, with a substantialdecrease in the production of arsenic-containing gypsum slag and neutralized slag. The by-productgypsum has been utilized as a resource, and the acidic wastewater is being recycled with zero emissions.The tail gas meets the discharge standards. This not only reduces environmental pollution but also lowersthe Company's operational and hazardous waste treatment costs, meeting sustainable developmentrequirements and providing a demonstration of clean production in the smelting industry.

Innovative Technology Achieved Hazardous Waste Slag Reduction and Promoted the Developmentof Green MetallurgyCase

Copper Branch: From 2023 to 2024, the hazardous waste generation decreased from27,354 tons to 11,893 tons, reducing slag by 15,461 tons, a year-on-year reductionof 56.5%. By classifying wastewater disposal, the Company conducted propertyidentification on neutralized slag and waste treatment, transforming neutralized slagfrom hazardous waste to general industrial solid waste.Tin Branch: In 2024, the Company reduced hazardous waste disposal by 2,919 tons.In particular, 2,025 tons of calcium carbonate slags were disposed of as general solidwaste, and 894 tons of second-stage slags from acidic wastewater treatment werecomprehensively utilized.

Hazardous

WasteMinimizationResultsResearch on Extracting Valuable Metals from White SootOn the basis of the technological transformation of the white soot utilization project in2023, the Company explored key technology applications and controlled key processparameters, continuously improved the problems existing in the trial operationprocess, and realized the stable operation of the whole process of the technology forcomprehensive utilization of white soot. The comprehensive utilization of white soot forthe whole year amounted to a total of 3507t.Comprehensive Utilization of Calcium Sulfate Slag in the Second Section of AcidicWaste Water TreatmentWithout affecting process indicators, the Company utilized the gasification furnace forthe comprehensive utilization of calcium slag sulfate in the second section of acidicwaste water treatment.

Comprehensive

Utilization of

Hazardous

Waste

Hazardous Waste Minimization in 2024

Quality Improvement through Sulfurization and Arsenic Removal: Focusing on theproblem of insufficient capacity of the hydrogen sulfide arsenic removal system, theCompany implemented sulfide arsenic removal transformation for quality improvement,and achieved stable operation of the new treatment process.Optimization of Acidic Wastewater Treatment: The Company reviewed the water qualityentering the acidic wastewater treatment station, optimized the treatment processof acidic wastewater, classified high-arsenic and low-arsenic wastewater for separatetreatment, converted some low-arsenic solid waste into general solid waste, and reducedthe amount of hazardous waste disposal through multiple channels.Tin-Copper Smelting High-Arsenic Acidic Wastewater Coordinated Treatment Trial:

The Company conducted experimental research on the sulfurization arsenic removalsystem for treating tin smelting acidic wastewater. The treated sulfurized liquid hasarsenic content ≤30 mg/L, achieving the expected targets. Currently, the Company isconducting experimental research on the high fluorine and chlorine content in the tinsmelting acidic wastewater, laying the foundation for the next step of coordinated acidicwastewater treatment.

TechnologyEnhancementfor Hazardous

WasteMinimization

Comprehensive Utilization of Solid Waste in 2024

Treatment of Historical Iron-Sintered Ball SlagsExploring multiple channels for handling the iron-sintered ball slags left by ThirdMetallurgical, the Company sold 194 thousand tons (95.9%) of such slag for outsourcedutilization, turning the leftover slag into valuable resources.Simultaneous Tailings Slurry Filling TechnologyDatun Tin Mine completed technological research and project construction. This projectcan fill 250k m? of tailings into underground mined-out areas each year, reducing theamount of tailings entering the tailings pond by approximately 320 thousand tons.

Comprehensive

Utilizationof GeneralIndustrial SolidWaste

In 2024, the Company coordinately advanced the research on comprehensive waste utilization and hazardous wasteminimization. With the goal of "minimizing the generation and disposal of low-value hazardous waste containingarsenic", The Company conducted surveys and in-depth on-site research to analyze and address key and difficultissues, and proposed measures to strengthen and improve work processes.

Waste Minimization

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Yunnan Tin Company Limited2024 Sustainability Report

The Company strictly follows theRegulations on the Control over Safety of Dangerous Chemicals, DeterminationStandards for Hidden dangers of Major Production Safety Accidents in Chemical and Hazardous Chemical Productionand Operation Units and Dangerous Chemical Production and Operation Units, Safety Specifications Of Special WorkIn Hazardous Chemicals Enterprises,as well as relevant regulations and internal rules such as theSafe ManagementProcess of Dangerous Chemicals and Hazardous Operations of Yunnan Tin Co., Ltd.,to ensure that the work on themanagement of dangerous chemicals is in compliance with the rules and regulations.

Yunnan Tin actively responds to the major strategic decisions of the Party Central Committee and the State Councilregarding carbon peaking and carbon neutrality, and fully lays out the green and low-carbon transformation.The Company has prepared theCarbon Peaking Implementation Plan, and made efforts in multiple dimensions,including structural adjustment, management enhancement, technological innovation, digital empowerment,elimination of outdated process equipment, and green energy manufacturing, to improve the collaborativeefficiency of pollution reduction and carbon reduction in the industrial chain, striving to build a green and low-carbon development pattern, and ensuring the smooth achievement of the carbon peak target by 2030.

In 2024, the Company carried out energy conservation and emission reduction, as well as energy-saving and carbonreduction practices, in an all-around, multi-measure approach throughout the production and operation of themining, selection, and smelting industry chain. In addition, we issued theNotice on Carrying Out Carbon EmissionAccounting and Data Reporting Management Work, and strictly conducted energy consumption data statistics,greenhouse gas (CO

) emission accounting, data aggregation, and reporting according to regulations, ensuringcomprehensive, accurate, and standardized management.

Management of Hazardous Chemicals

Corporate Governance

Strategy

Addressing Climate Change

Fully leverage the advantages of integrated regional mining and selection, as well as the "three majorplatforms", to continuously optimize various production systems such as mining development,transportation, and ventilation. Optimize to make the regional system become more streamlined andefficient, significantly improve transportation efficiency, further enhance the matching level of mining andselection, coordinate various production processes to achieve energy conservation and carbon reduction,and effectively promote energy-saving and emission-reduction in the production process.

Optimizing Energy Consumption Structure: Vigorously reduce fossil energy consumption, actively promotecoal consumption substitution and transformation in the smelting process, realize coal reduction andrestriction in key coal-consuming processes, and actively adopt measures such as using green electricityinstead of coal and natural gas instead of coal, to adjust the energy consumption structure and reducecarbon emissions.

Optimization of Production Operations

Promotion of Green Energy Use and Green Manufacturing

Dangerous Chemicals Management SystemInformation Management·List Update: Timely update the list of dangerous chemicals and accurately grasp the types and quantities of d chemicalsin the Company.·Data Collection: Comprehensively collect safety technical data sheets and safety labels, and provide accurate technicalinformation and warning messages for the safe management of dangerous chemicals.

Risk Management and Contro·Risk Identification: Organize professional technical personnel to carry out a comprehensive safety risk identification forthe dangerous chemical production process systems, usage processes, and storage facilities, identifying potential safetyhazards.·Risk Assessment: Conduct risk evaluations to assess the severity and likelihood of occurrence of risks. MeasureFormulation: Take appropriate safety measures to reduce the level of risk based on risk identification and evaluationresults.Personnel Capability Enhancement·Implementation of Training Plans: Offer safety training to key personnel, safety management personnel, and specialoperation personnel handling dangerous chemicals according to the training plan.·Knowledge and Skill Acquisition: Ensure relevant personnel are familiar with the physicochemical properties ofdangerous chemicals, and knowledgeable about hazardous characteristics, first aid measures, emergency responsemeasures, and personal protective measures.·Standardization of Operations: Standardize employees' operations, ensure correct use of personal protective equipment,and enhance employees' safety awareness and operational skills.Optimization of Safety Evaluation

·Standardized Self-Assessment: Conduct an annual self-assessment of safety standardization to measure the extent towhich the Company's management of dangerous chemicals is in compliance with the standardization requirements.·Evaluation of Current Situation: Regularly assess the current status of safety management of dangerous chemicals andidentify problems and deficiencies in management. System Improvement: Continuously revise and improve the operatinginstructions and safety procedures, and optimize the safety management system, based on the assessment results.Maintenance of Facilities and Equipment·Regularly inspect and maintain safety facilities such as ventilation, explosion prevention, leakage prevention, fireprevention, lightning protection, sun protection, moisture prevention, theft prevention, static electricity prevention,and protective embankments, as well as emergency equipment and facilities, to ensure they are in effective operatingcondition, providing hardware support for the safe storage and use of dangerous chemicals.

Key Optimization Measures for Energy Conservation and Carbon Reduction in 2024

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Yunnan Tin Company Limited2024 Sustainability Report

In 2024, facing challenges such as high energy consumption, high costs, and technical limitations of traditionalfuel-powered mining trucks, Hualian Zinc Indium, based on previous research findings, cooperated with multipleparties to optimize equipment configurations and implement the "Fuel-to-Electric" Conversion— decommissioningsome old fuel-powered models and promoting the large-scale use of high-tonnage pure electric rigid mining trucks.After the implementation of "Fuel-to-Electric" Conversion, the comprehensive unit cost of 28 pure trolley cars was

The "Fuel-to-Electric" Conversion Leads Energy Conservation and Emission Reduction and SupportsGreen Development of MinesCase

Pure Electric Rigid Mining Trucks

Applying New Technologies: Continue to promote new technologies such as tailings paste filling mining, pre-selection waste disposal, and energy-saving technology transformation for tin refining furnaces, to reduceenergy consumption from the source of production processes.Conducting Equipment Upgrades and Transformations: Use technologies such as variable frequencyspeed control and permanent magnet synchronous direct drive to upgrade mining, selection, and smeltingequipment. Replace traditional equipment with high-efficiency, low-energy-consuming equipment toimprove equipment operation efficiency and reduce energy consumption.Improving Waste Heat (Energy) Utilization: Increase research on waste heat recovery and utilization, andcarry out improvements to enhance the efficiency of waste heat power generation units. This will increasethe waste heat recovery rate and power generation efficiency, while exploring carbon capture, utilization,recycling, and storage technologies in smelting enterprises to provide technical reserves for deep carbonreduction.

Digitization of Management: Promote the application of various management software to realize standardized andrefined management in multiple fields such as human resources and finance. Use digital supervision to improvemanagement efficiency and reduce resource waste.Digitization of Mines: Introduce digital mining management software systems, establish databases and models,and apply geological measurement and mining coordination platforms and remote control for 8 major systems toimprove the digital level of mining, optimize production processes, and reduce energy consumption.Digitization of Dressing Plants: Promote full-process digital control of the selection plant, apply various expertcontrol systems, improve production efficiency in the selection plant, and achieve energy conservation andconsumption reduction.Digitization of Smelting: Explore the application of cutting-edge technologies in smelters, promote the applicationof intelligent equipment, warehousing and logistics and energy management platforms, enhance the automation,informatization and intelligence level of smelters, and reduce energy consumption and carbon emissions.

Deepen research and application on the "waste minimization, waste valorization and environmentally soundmanagement" for the treatment of solid waste. Increase the application of rock filling and tailings pastefilling in underground mines, reduce waste rock removal and tailings discharge; focus on the constructionof rigid landfills for hazardous waste in the smelting stage, address the shortcomings in hazardous wastedisposal, reduce the environmental impact of solid waste, and realize the recycling of resources and energyconservation and emission reduction.

Fully review outdated processes and equipment in mining, selection, and smelting, accelerate theelimination of high-energy-consuming and low-efficiency motors and transformers, and complete theelimination of 545 high-energy-consuming devices, to effectively reduce energy consumption and overalloperating costs and improve energy utilization efficiency.

Implementation of Technological Upgrading

Advancement of Digital Empowerment

Enhancement of Comprehensive Utilization of Solid Waste

Elimination of Outdated Processes and Equipment

The Company has identified risks associated with extreme weather conditions, such as strong winds and heavyrainfall, during the operation of open-pit mines, waste dumps, tailings ponds, tunnels, slopes, construction projects,power stations, water and power supply lines, and their ancillary facilities during the flood season. These risksinclude landslides, mudslides, dam breaches in tailings ponds, tailings leakage, damage to buildings and equipment,potentially causing company shutdowns, casualties, property loss, and environmental pollution. To address these risks,the Company has implemented extreme weather early warning and information reporting systems, managed eventsbased on their impact level, and established a comprehensive risk emergency response organization.

Impact, Risk, and Opportunity Management

Taking Renewable Energy Substitution Actions: Actively participate in the cooperative development andconstruction of wind and photovoltaic power generation, using closed tailing ponds to build photovoltaicpower projects. This not only increases the share of renewable energy in the energy structure but alsofurther reduces dependence on traditional fossil energy, driving the green transformation of energy.Building a Green Manufacturing System: Build leak-free factories in the mining, selection, and smelting stages,fully implement clean production, and actively create green mines and green factories. Promote coordinatedgovernance for emission reduction and carbon reduction, starting from various stages of production toachieve synergistic development of energy conservation, emission reduction, and environmental protection.

lower than that of fuel-powered ones by 1.05 yuan/m?.km, whichsaved RMB 21.9056 million in transportation costs and solvedthe "bottleneck" of core technologies. This not only reduces theCompany's costs, supports the achievement of the "carbon peakingand carbon neutrality" goals, but also provides an exemplary modelfor the industry in terms of energy conservation, emission reduction,and technological upgrades.

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Yunnan Tin Company Limited2024 Sustainability Report

The Company attaches great importance to green operations, keeps close monitoring of greenhouse gas emissions,and requires all subsidiaries to track and report on their emissions.

Metrics and Targets

TypeEmissions in 2024 (tCO

e)Scope 1 GHG Emissions293,910Scope 2 GHG Emissions1,257,098GHG Emissions Reduced due to Emission Reduction Measures54,048GHG Emissions (Scope 1 + Scope 2)1,496,960

Greenhouse Gas Emissions

In 2024, Yunnan Tin actively practiced the philosophy of circular economy, regarded it as the key path to drivinggreen development, improved resource utilization efficiency, and achieved a win-win result in both economic andenvironmental benefits. In 2024, the Company set clear goals for recycling and continuously explored innovationsin production practices. Significant achievements were made in the resource utilization of gypsum slag and tailings,which not only effectively reduced the waste of resources and environmental risks, but also provided a valuablepractical example for the industry's green and sustainable development.

Circular Economy

ItemObjectivesDescriptionsAchievement

Copper Content inCopper Matte

176 tons

The copper slag is treated to produce copper matte which isinternally supplied as a raw material for smelting.

AchievedRecycling Goals and Achievements in 2024

In 2024, Wenshan Zinc Indium conducted in-depth research on the raw material characteristics, processcontrol, and end-stage washing and recovery of gypsum slag, and successfully developed a two-stage gypsum washing system and relevant modification technology. Leveraging this technology, theCompany processes industrial by-product gypsum into gypsum powder, gypsum blocks, and otherbuilding materials, effectively expanding the application fields of gypsum slag. This has achieved theresource utilization of gypsum slag, reduced its potential environmental risks, decreased the need fornatural gypsum resource extraction, and has positive significance for ecological and environmentalprotection. What's more, Wenshan Zinc Indium recovers 300 tons of zinc metal and 5 tons of indium eachyear, improving resource utilization efficiency and economic benefits. This also provides the industrywith a successful practical case of solid waste resource utilization, and effectively promotes the greendevelopment of the industry.

Valorized Utilization of Gypsum Slag Opening up a New Path of Green DevelopmentCase

Based on the large existing tailings resources and the various metals contained, as well as opportunitiesbrought by the development of the non-ferrous metal market and mineral processing technologies,the Company carried out the comprehensive utilization of the tailings pond at the shady thrust of theHuangmao Mountain at the Laochang Branch in 2023, and conducted small and pilot studies after theexploration of such resources. In 2024, a 1,300 t/d industrial demonstration line was established, with anannual production of over 400 tons of tin-rich concentrate. This project has achieved effective utilizationof tailings resources, increased resource utilization rates, and reduced the environmental risks associatedwith tailings storage, in line with national green and safe development philosophy. It provides technicaland management support for subsequent large-scale tailings resource extraction and helps promotesustainable development in the industry.

Building Tailings Utilization Demonstration Line and Opening a New Journey for Resource UtilizationCase

In the pursuit of sustainable mining development, Yunnan Tin integrates the philosophy of green developmentthroughout its mining operations, formulates theMeasures for the Administration of Mining Technologies (forTrial Implementation), and standardizes the mine extraction, safety management and other work, to build a solidfoundation for sound development. We construct a scientific ecological management system, monitor and assessecological impacts in real time, and adjust mining strategies and protection measures accordingly. In terms ofecological restoration, we develop plans to restore ecological damage areas by means such as vegetation restorationand soil improvement, striving to build green mines and promote green mining development.

Ecosystem and Biodiversity Conservation

Conductingpeople-orientedand safe rescue

Enforcingresponsibilitiesand hierarchicalaccountability

Realizingself-help andmutual aid andseeking external

assistance

Principles for Emergency Response

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Yunnan Tin Company Limited2024 Sustainability Report

The Company strictly follows theSpecification for Green Geological Survey and Mineral Explorationand otherstandards and policy requirements, and comprehensively promotes green exploration. By adopting advancedexploration methods such as using drilling instead of trenching and multi-porous foundation drilling, the Companystrengthens project implementation supervision and management, improves exploration technology and equipmentlevels, ensures high-quality completion of mineral exploration objectives, minimizes environmental impact whileensuring resource development, and makes unremitting efforts to build a green mine.

Green Mining

Development:

RiskIdenti?cationProtection:

EcologicalManagement

Greening:

Restoration andCompensation

Green Mine Development Mode

Principles of Green MiningBefore the pre-project planning and ground disturbing activities, the Companyconducts comprehensive risk assessments within the project scope, along withgeological surveys, to evaluate and identify high biodiversity areas and speciesimpact risks. The Company works to control the impact range and mitigatebiodiversity effects, continually improving ecological quality, and achievingcoordinated development of ecological restoration and sustainable production.The Company prioritizes the protection and sustainable use of biodiversity. Byenhancing environmental protection education and awareness training for internalemployees, the Company deepens understanding and attention to ecologicalprotection at the awareness level, and at the action level, creating a culture offull participation in ecological protection. This mobilizes all employees to jointlydedicate efforts to safeguarding green ecology and advancing environmentalprotection initiatives.The Company strictly formulates and implements mining geological restorationand land reclamation plans. Through timely restoration of land and plant andanimal communities, the Company continuously improves the vegetationcoverage rate of mines and the greening rate of factory areas, enhances the carbonsequestration capacity of the mine's ecosystem, and achieves the sustainabledevelopment of the mine's ecosystem.

Green Mines

Have good workingconditions to ensure

mining safety

Apply efficient miningtechniques andmethods to improvemechanized productionand labor productivityand reduce mining costs

Take comprehensiveenvironmentalprotection measuresto reduce the negativeimpact of mining on theenvironment

Possess sustainabledevelopment capabilities,reduce loss and dilutionrates during mining, andreasonably control energyconsumption by miningactivities

MiningSafety

In the process of mining innovationand green mine construction, theCompany is actively engaged inupgrading mining technology andvigorously promoting the applicationof backfill mining methods. InJanuary 2024, the tailings pastefilling system at Datun Tin Mine wassuccessfully completed and officiallyput into operation, which will helpthe Company achieve efficient miningwhile making continuous progresstowards green and sustainabledevelopment.

Mining Innovations Promote the Construction of Green Mines

Case

In January 2024, the construction project of thesynchronized tailing paste filling system project atDatun Tin Mine successfully passed the inspectionand acceptance upon completion.

In 2024, the Company achieved 79,000 m? of tailings paste filling and 356,000 m? of waste rockbackfill; and in 2025, the Company plans to complete310,000 m? of tailings paste filling and 240thousand m? of waste rock backfill.

In ecological management, the Company always views safeguarding green ecology as an important mission.The Company plans mineral development reasonably, reducing the negative impacts on ecosystems from thesource; establishes strict systems for tailings pond management, ensuring safe disposal of tailings and reducingenvironmental risks; actively conducts soil pollution investigations and remediation to ensure soil environmentalquality; and builds a comprehensive monitoring and prevention system for geological disasters, organizing hazardinspections, rectification, and emergency drills. Through multiple measures, we promote ecological managementcomprehensively and fulfill our ecological responsibility effectively.

Green Mines

Mining Safety

Environmental

Protection

High E?ciencyLow Consumption

Key Performance

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Yunnan Tin Company Limited2024 Sustainability Report

In strict compliance with a series of laws and standards, such as theEnvironmental Protection Law of the People'sRepublic of China and the Regulations on the Supervision and Management of Tailings Ponds, and based onits own practices, the Company formulates and implements theMeasures for the Administration of TailingsPollution Prevention and Control and the Measures for the Administration of Tailings Pond Safety, clearly definingresponsibilities and standardizing processes in areas such as pollution control and safety management. In 2024, theCompany made solid progress in the safe and compliant construction of tailings ponds, completed the processing ofsafety production permits for 5 tailing ponds in 3 units, and promoted four tailing ponds to complete the assessmentof the second level of standardization of safety production, so as to enhance the level of tailing management in allaspects.

Management of Tailings Ponds

Water Quality Monitoring

Conduct regular sampling and testing of water quality in the reservoir and groundwatermonitoring wells according to the monitoring plan.

Water Quality MonitoringAccurately record the tailings volume to provide a basis for environmental pollution controlafter the closure of the tailings pond.

Monitoringand Statistics

Tailings Management System

Assessment in Flood Season

Conduct at least one comprehensive assessment and management before each flood season.

Plan Formulation

Formulate management plans based on the list of issues identified during the inspection andin combination with daily inspection and management, implement "one pond, one plan"management, define specific management measures, completion timelines, and follow-upmanagement actions, and eliminate pollution risks.Risk InspectionEnsure that personnel at all levels strictly follow the dual-prevention mechanism forenvironmental risks to conduct daily and monthly inspections, and that corrective measures,responsible persons, and timelines are in place for identified issues.

Identi?cationandManagement

Account Management

Establish an environmental management ledger for the tailings pond, and implement "onepond, one file" management.Dust ControlStrengthen solidification, greening, and watering work on the dry beaches of the tailings pondto prevent dust from tailings. Release the ore according to the design requirements.

Elimination of External EmissionsStrictly prohibit tailings and tailings from being discharged to prevent pollution of thedownstream environment. Ensure proper downstream environmental monitoring andprevent latent pollution after the accident if external discharge is necessary due to risks totailings pond safety (such as a major safety accident or during flood discharge), and promptlyreport accidents (if any) to the workshop, mine department, and environmental protectiondepartment, and notify downstream residents.Prohibition of Harmful ActsProhibit any unit or individual from arbitrarily digging, reclaiming, grazing, building, orengaging in any other activities that may interfere with the normal use of tailings pond facilitiesor cause potential pollution hazards.

Environmental

Management

Drainage Facilities

Timely clear flood discharge channels and drainage ditches to keep them unobstructed;maintain stable water levels in the catchment area, and regularly inspect the condition ofdrainage and seepage facilities.

Transmission Pipeline

Ensure relevant units regularly inspect the tailings transportation pipelines to preventoccurrences of "leakage, overflow, dripping, and leakage".Backwater Pool and Backwater Pump

Strengthen the inspection and management of the backwater pool to ensure its effectiveoperation and prevent overflow; carry out regular inspections and maintenance of thebackwater pump to guarantee 100% recycling of the backwater.

Maintenanceof Facilities

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Yunnan Tin Company Limited2024 Sustainability Report

Tailings Pollution Prevention Measures in 2024

Managementof In-serviceTailings Pond

Closure ofTailings Pond

Control of Dust GenerationTake measures such as "spraying water toreduce dust", "covering with a dustproofnet", and "surrounding mineral placementto ensure the moisture of the tailingsurface", and reduce the environmentalpollution caused by dust from the tailingspond.Prevention of Groundwater PollutionTake measures like "constructing leachatecollection pools and groundwatermonitoring wells", "recycling leachatefor dust reduction in the pond area", and"conducting groundwater monitoringas required", to effectively prevent thetailings pond from polluting groundwater.

Closure of Kafang Tailings PondThe Kafang Tailings Pond ClosureProject was completed and accepted inSeptember 2024, and the reclamation andgrass planting area of the pond area was

427.3 thousand m

.

Treatment of Tailings WastewaterRecycle all tailings wastewater inLaochang Branch, Kafang Branch, andDatun Tin Mine for production; treatthe remaining wastewater after reusein Hualian Zinc Indium and dischargeit in compliance with environmentalstandards, ensuring that wastewatertreatment meets environmentalprotection requirements.

Closure of Wanlongshan Tailings PondThe reclamation and treatment ofreservoir beach in the WanlongshanTailings Pool Closure Project wascompleted in April 2024, and thereclamation and grass planting area was230 thousand m

.

Monitoring and Control System for Slopes andWaste Dumps in Mines

Record Filling

Ensure that the staff carefully fill in records related to the tailings pond and that the records arecomplete and accurate.Inspection SystemEstablish an inspection system for workshops to conduct day-and-night inspections of thetailings pond, eliminate potential risks, and ensure that no environmental pollution incidentsoccur in the tailings pond.Familiarity with Emergency ResponseEnsure the tailings pond inspectors familiarize themselves with the emergency response planfor environmental emergencies and actively participate in the rehearsal of the plan.

PersonnelManagement

From 2021 to 2024, the Kafang Branch implemented the closure and treatment of the decommissionedKafang Tailings Pond. During the period, the Company organized professional personnel to conductcomprehensive surveys and evaluations, completed topographic map measurements, geotechnicalengineering surveys, and other preliminary tasks, and developed a scientific treatment plan based on thesedata. In 2024, the Company completed tailings pond treatment projects, including the construction of newdrainage ditches on the surface, surface leveling, soil covering and grass seed planting, and the removalof blocked overflow pipes. After treatment, the safety hazards of the tailings pond were eliminated,the reclamation and grass planting area reached 427.3 thousand m

, the ecological environment wasimproved, biodiversity increased, land resources were revitalized, and a successful example for tailingspond management was provided to the industry, achieving the collaborative development of safety,ecology, and economy.

Closure of Kafang Tailings Pond: A Solid Action to Safeguard Ecology and SafetyCase

Scientific planning and precise design: From 2021 to 2024, theCompany organized professionals to conduct comprehensive surveysand evaluations of the tailings pond, completed topographic mapmeasurements, geotechnical engineering surveys, and other preliminarywork, and developed a closure treatment plan based on data and terrain,laying the foundation for the design of safety facilities.Strict review and legal advancement: In January 2024, the Companyinvited experts organized by the Department of Emergency Managementof Yunnan Province to review the safety facility design, and obtainedapproval in March, to ensure the legal and compliant advancement of theproject.Efficient construction and fine management: The construction beganin May 2024. To address challenges such as tight schedules andconstruction during the flood season, the Company cooperated withconstruction, design, and supervision units, coordinated the schedule,allocated resources, and strengthened safety and quality control. Themain project was completed in June; internal completion inspection wasconducted in July; and safety facility completion inspection was passedin September.

TreatmentMeasures

for KafangTailingsPond

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Yunnan Tin Company Limited2024 Sustainability Report

Kafang Tailings Pond after Treatment Kafang Tailings Pond after Treatment

In accordance with theEnvironmental Protection Law of the People's Republic of China, theLaw of the People'sRepublic of China on Prevention and Soil Pollution Prevention and Control Law of the People's Republic of Chinaandother laws and regulations, the Company prepares the Potential Soil (Groundwater) Pollution Hazard IdentificationSystem, along with inspection and monitoring plans, to carry out the identification, treatment, and monitoring ofpotential hazards, and submit related reports as required. Some units have carried out monitoring, identification,and report filing for toxic and hazardous substances with multiple approaches to effectively control soil pollutionand actively protect the soil ecological environment.

Treatment of Soil Pollution

Potential Soil Pollution Hazard Identification ProcessDetermine key sites or key facilities and equipment for hazard identification

File the potential soil pollution hazard identification report with environmental

authorities

Prepare potential soil pollution hazard

inspection reportEstablish archives for the identification of

potential soil pollution hazards

Develop plans/suggestions for the remediationof potential soil pollution hazardsImplement the rectification of potential soil

pollution hazards

Summarize the experience of potential soil pollution hazard identification work

Conduct on-site inspection of potential soil pollution hazards

Collaborate with the Company to organize expert technical reviews to ensure the

potential pollution hazard identification report meets filing requirements

Thermal Imaging Map of Geological DisasterEmergency Drill by Drone

Measurement Robot for Geological DisasterOnline Monitoring System

In 2024, in the face of the severe situation caused by geological disasters triggered by special weather, the Companyorganized all mines to carry out a "100-day campaign" for geological disaster hazard risk investigation andremediation according to theGeological Disaster Emergency Response Plan. The focus was on key areas such asmining production zones and tailings storage areas. The Company cooperated with government natural resourcedepartments to conduct regular patrols and inspections of 20 geological disaster and hazard points. The Companyconducted publicity, training, and emergency drills at the Datun Tin Mine to promote disaster prevention and controlknowledge, and effectively improved the workers' ability to avoid risks and their awareness of disaster preventionand reduction, ensuring the safety of the mines and the life and property of the personnel.

Geological Disaster Control

Elimination of Safety Hazards: The drainage system was optimized, safetyfacilities were improved, and the safety performance of the tailings pondwas enhanced, enabling the tailings pond to withstand natural disastersand unexpected impacts, ensuring the safety of surrounding residentsand the Company's production.Improvement of Ecological Environment: Grass seeds were sowed on aland of 417,800 m?, vegetation coverage rate increased, dust pollutionwas controlled, air quality improved, and biodiversity gradually enriched.Revitalization of Land Resources: Land resources were released topromote regional economic development. This provides the industrywith a closure treatment example, and enhances the industry's safetyand environmental protection standards.

Treatment

Resultsof Kafang

TailingsPond

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Yunnan Tin Company Limited2024 Sustainability Report

In 2024, the Company conducted 22 geological disaster patrols and inspections, proposed 47 remedial measuresand suggestions, submitted the comprehensive geological disaster hazard investigation records12 times, prepared

the Report on the Geological Disaster Hazard Risk Inspection and Identification for the Mining Area in Response to

Typhoon Yagi, and supervised mine units to conduct four single-point emergency drills.

On the path of practicing sustainable development, the Company attaches great importance to ecologicalrestoration and biodiversity conservation, and strictly follows the Kunming-Montreal Global Biodiversity Framework,the sustainability standards of International Finance Corporation (IFC), and the Convention on Biological Diversity,striving to achieve the goals of biodiversity conservation and sustainable use by 2030.In 2024, the Company formulated the Measures for the Administration of Mining Ecological RestorationImplementation (for Trial Implementation) and each mine developed a "one mine, one policy" remediation planbased on their actual needs. Through measures such as soil covering and vegetation greening, the Company is fullypromoting the ecological restoration of historical slag heaps, tailings ponds, and abandoned mines, to promote theaccelerated development of mining ecological construction.

Ecological Restoration

In 2024, Tin Branch carried out ecological restoration at the iron-sintered ball slag dump. The Companyentrusted a professional organization to test the soil, prepare feasibility studies and implementationplans, and organize expert reviews; the site management included slope restoration, soil covering, anddetermining the direction of forest restoration. A combination of trees and grass was used for greening,planting and sowing camphor trees, Bermuda grass, and clover, with subsequent care and management.A total of RMB 1.3914 million was invested in the project, effectively preventing geological disasters,controlling soil erosion, increasing vegetation coverage, restoring soil functions, and providing support forthe Company's sustainable development.

Ecological Restoration of Iron-Sintered Ball Slag Dump to Ful?ll the Responsibility in Green DevelopmentCase

Soil-restored Iron-Sintered Ball Slag Dump

The Company actively promotes ecological restoration at multiple waste dumps and slopes, involvingseveral areas in Laochang Branch, Kafang Branch, Datun Tin Mine, and Hualian Zinc Indium. The ecologyof the site has been effectively restored through site levelling, clean-up, demolition of old buildings andhardening of the ground, mulching, planting of trees, shrubs and lianas, as well as sowing of ryegrassseeds, and subsequent monitoring and management efforts. After restoration, vegetation coverage ateach site has significantly increased, soil erosion has notably decreased, and the regional ecologicalenvironment has been significantly improved, creating suitable habitats for surrounding wildlife andpromoting ecological balance.

Ecological Restoration in Mining Areas Creates a New Green LandscapeCase

1820# Waste Dump of Kafang Branch16# Waste Rock Yard of Datun Tin Mine

Re-greening and Reclamation of Mining Area

Key Performance

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Yunnan Tin Company Limited2024 Sustainability Report

In 2024, the Company set a target of completing 91 hectares of mining ecological reclamation but actually completed

110.39 hectares of ecological restoration, achieving 121% of the target; and in 2025, the Company plans to

complete97 hectares of mining ecological reclamation.Currently, the Company has completed a total of 748.63 hectares of mining ecological restoration.

Mineral resources are the key to the survival and sustainable development of the Company. Yunnan Tin activelyfulfills its responsibility for resource protection by expanding the resource scale through geological exploration,optimizes mining and beneficiation indicators to improve resource utilization efficiency, and advances resourceprotection through a dual approach of "increasing supply" and "reducing waste". In the mining production process,the Company accelerates mining site construction, ensures proper mine site replacement, guarantees the balanceof the three-level mineral volume, and enhances production capacity. In terms of beneficiation, the Companyfocuses on full-load production, researches technological transformations, reasonably allocates ore types, improvestechnical and economic indicators, enhances comprehensive resource utilization, and strengthens the supply of self-produced raw materials, continuously consolidating the results of resource protection.

The Company has formulated related regulations,such as the Measures for the Administration ofMineral Resource Reserves of Yunnan Tin Co.,Ltd., the Measures for the Administration ofGeological Exploration (Survey) of Yunnan Tin Co.,Ltd., covering the entire process from geologicalexploration, resource expansion, upgrading anddensification, to consumption and eventualmining.

With daily coordination meetings as a tool andspecialized meetings as an entry point, theCompany gradually reconstructs the miningproduction scheduling management system,promptly corrects and resolves issues arisingduring production, such as mining loss rate,ore depletion rate, and beneficiation recoveryrate, continuously improving productionoperations and resource utilization quality.

Protection of Mineral Resources

Mineral Resource Protection Mechanism

Increasing SupplyReducing Waste

Establish a development pattern of "One Center, Three Platforms, Four Slopes, Five Shafts,Three Areas, Three Plants, Four Mines": "One Center" refers to the central hub of the miningarea. "Three Platforms" represent three multifunctional platforms, each with specificresponsibilities. "Four Slopes" are the four inclined tunnels extending to each productionarea, designed to enhance working conditions and efficiency. "Five Shafts" refer to the fiveventilation shafts, distributed across the production areas to mitigate air pollution andoptimize airflow. "Three Areas" describe the establishment of 3 production support systems,aiming to intensify operations while achieving energy conservation and emission reduction."Three Plants" are three large modern flotation plants, consolidating the original 14 smallerplants to optimize mining and beneficiation capacity. "Four Mines" refer to four miningoperations that replace the previous 26, streamlining the allocation of mining resources.

Prepare the mining (stripping) technical plan for each mine in advance every year, and followthe principle of "synchronizing mining (stripping) and prioritizing tunneling (stripping)",to ensure a balance of three-level mining volume and coordinate current production withsustainable development

Make proper exploration and mining deployments, strengthen exploration of the upper andcentral systems; and based on mining conditions, conduct backfilling and selective mining toimprove resource utilization.

Study the geological factors controlling mineralization, conduct mineralization predictions,and prospect in underexplored areas; strengthen the approach of "searching for potentialmineral sources by exploring the surrounding or adjacent areas of an existing ore andexploring the boundary of a known ore body to understand specific characteristics includingthe bottom or edge" to improve the control over exploration.

Emphasize integrated mining, exploration, evaluation, and utilization; and evolve from singletin metal development to the recovery of more than ten beneficial components.

Reshapingthe ResourceDevelopmentPattern

Preparing

ScientificMiningPlans

Improving

ExplorationDeploymentand

UtilizationRate

Optimizing

Geological

ResearchandExploration

AdvancingComprehensiveDevelopmentand Utilization

Optimization Measures for Mineral Resource Utilization in 2024Key Performance

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Yunnan Tin Company Limited2024 Sustainability Report

Shaping a Prosperous Future Centeredaround Social ContributionYunnan Tin always adheres to the core philosophy of innovation-driven development, responsibility fulfillment, and win-win cooperation, striving to play an active role in the broad stage of social development. The Company understands that thesuccess of an enterprise comes not only from the creation of economic value but also from its contributions to and promotionof social welfare. Therefore, we place great importance on the safety and quality of our products and services, seeing them asthe cornerstone of our survival and development; and we uphold data security and customer privacy protection, with customertrust as our highest principle. In supply chain management, we make every effort to safeguard the security and stability of thesupply chain, and ensure that each link operates efficiently and sustainably. We value the contributions and growth of eachemployee and strive to create a work environment full of care and opportunities, enabling both employees and the Companyto grow together. In addition, the Company actively participates in social contributions and rural revitalization efforts, creatingmore value for society and making a greater contribution to a sustainable future.

Innovation-Driven Development 「"a Topic of Double Materiality"」Product and Service Safety and Quality 「"a Topic of Double Materiality"」Data Security and Customer Privacy ProtectionSupply Chain Due Diligence「"a Topic of Double Materiality""a Topic of Double Materiality"」

EmployeesSocial ContributionRural RevitalizationIndustry Co-construction

Tin Branch Company Chung Yeung Festival to honor the elderly sympathy

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Yunnan Tin Company Limited2024 Sustainability Report

Yunnan Tin deeply understands that innovation is the core driving force for development. The Company practices thenew development philosophy, firmly focuses on aligning the innovation chain with the industrial chain, promotes thedevelopment of new quality productive forces, fully implements the innovation-driven development strategy, andvigorously advances technological innovation efforts. The Company has formulated the Measures for the Administrationof Science and Technology Work based on national major policies and guidelines. We continuously increase investmentin scientific research to provide solid financial support for innovation; actively recruit talented individuals to gatherinnovative wisdom; and expand external cooperation to absorb diverse innovation resources. We also focus on solvingkey core technologies, breaking through development bottlenecks, accelerating the transformation of scientific andtechnological achievements, and strengthening the foundation of innovation from multiple dimensions.

GovernanceInnovation-Driven Development

「"a Topic of Double Materiality"」

Key HonorsIn 2024, Hualian Zinc Indium was recognized as a national high-tech enterprise; Wenshan Zinc Indium was selected asone of the sixth batch of National "Little Giant" Specialized and Sophisticated Enterprise that Produces Novel and UniqueProducts; the "Digital and Intelligent Factory" of Tin Branch was selected as an excellent case for the "Digital China"Construction Summit and became a key support project for the "Lighthouse Factories" initiative in Yunnan Province.

Main Management Responsibilities of Technology WorkPolicy Planning and IncentivesImplement the Party and national science and technology policies, carry out the Company's technologicalinnovation strategy, and draft technology innovation incentive policies to create a favorable policyenvironment for the Company's technological innovation. Organize research and prepare medium- and long-term science and technology development plans and implementation measures, as well as annual scienceand technology plans and budget preparation to provide strategic guidance and resource support for theCompany's technological development.

Project Full-Process Management

Conduct comprehensive management, supervision, and guidance services for the Company's technologicalwork. Specifically organize, coordinate, and inspect the approval, contract signing and implementation,project execution, and acceptance at different stages of the technology plan, and ensure that scientific andtechnological projects proceed in a standardized and orderly manner. Organize the preliminary technicaldemonstration and evaluation of major technology introduction and renovation projects, as well as theorganization and management of awards and evaluations for key technological breakthrough projects, andsafeguard the technical feasibility of the projects and the fairness of the award review.Technology Resources and Achievement ManagementManage the Company's science and technology statistics and archives, organize performance evaluationsand assessments of scientific and technological activities, and provide data support and performance basisfor the Company's scientific and technological decision-making. Conduct daily management of scientific andtechnological achievements and patents, establish patent work systems, guide, coordinate, and inspect thepatent work of affiliated units, balance the total number of patents and manage the patent ledger, organizeand recommend science and technology award reviews, and promote the transformation of scientific andtechnological achievements and intellectual property protection.Technology Resource Coordination and External Communication

Coordinate and manage science and technology innovation platforms and other technological resources ofthe Company and its affiliated units, and promote resource sharing and efficient utilization. Organize externalscientific and technological exchange activities, strengthen the Company's connections and cooperation withexternal research institutions and enterprises, enhance the Company's technological influence, and introduceexternal resources and advanced philosophies for the Company's technological innovation.

Through Continuous Deepening of Technological ManagementReforms, the Company's Innovation and R&D System Has Been

Further Improved.

Strengthen top-level design, clarify the functional positioning of

the decision-making, management, and execution levels, andenhance the macro management and coordination ability oftechnological innovation work.Improve the technology management structure at the grassroots

level, achieve full coverage of technology management functions,establish a layered management model with complementaryadvantages, and solidify the management foundation forinnovation and R&D.

Improve the incentive mechanism,

revise the reward system, and improverelevant systems such as the evaluationcriteria for technological innovation.Stimulate innovation vitality, andprovide a solid institutional guaranteefor the construction of the innovationand RD system.

Optimizing Innovation ManagementStructure

Improving System toEncourage Innovation

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Yunnan Tin Company Limited2024 Sustainability Report

The Company has established a comprehensive and highly incentivizing innovation mechanism. In termsof evaluation, the quantity of patent authorizations and the application of the patent system are importantperformance assessment criteria for the technological activities of each subsidiary; in terms of rewards,inventors of authorized job-related invention patents are given one-time rewards, motivating employeesto actively engage in innovative practices and improving the Company's overall innovation strength andintellectual property reserve.

Use technologies as a link and projects as a

carrier, optimize the allocation of technologicalresource elements, and consolidate the strengthof all parties. Create a comprehensive innovationsystem covering technological R&D, achievementtransformation, talent cultivation, and opencooperation, and provide sustained momentumfor innovation and R&D.

Incorporate standards and patents into the entire

process of technology reserve, project R&D,achievement transformation, and applicationpromotion, and treat them as key elements andindicators of technological innovation work toenhance the Company's independent innovationcapability.

Integrating Resources to DriveInnovation

Strengthening Standard and PatentLayout

Strategy

In 2024, the Company used the three-year action plan for technology-driven efficiency as a key focus todeeply promote the integration of the innovation chain with the industrial chain, continuously increasinginvestment in R&D, and implemented 37 Class-1 technology projects and 197 Class-2 technology projects.The implementation of a series of key technology development projects, such as the Research on theOptimization of thePre-crushing and Waste Discarding Process for Oxidized Ore System, the Research on theLocalization of 125 t-135 t Hydraulic Backhoe Excavators, the Research on the Secondary Safe and EfficientMining Technology for Old Resources under Complex Geological Conditions in the East Area of Gejiu, and theResearch and Application of Electric Furnace Smelting Technology for Tin Polymetallic Materials, has laid thefoundation for the enhancement of the Company's technological innovation capabilities. The Company hascollaborated with Kunming University of Science and Technology to establish the Yunnan Tin Sub-center of theNational Engineering Research Center of Vacuum Metallurgy. We are fully committed to creating a technologicalinnovation hub in the field of non-ferrous metal metallurgy.

Technological Innovation

RevolutionizingMining Methods

PromotingProductionMode Upgrades

"Reconstruction and Continuous MiningTechnology for Pillar Re-creation in GentlyInclined Thick Ore Bodies": Improve theproduction capacity, mining efficiency, andrecovery rate of the mining field, and allow thepreviously difficult-to-use low-grade dead oreto be developed and utilized, thus expandingthe range of available resources."Comprehensive Technology for IntensiveMining of Low-Grade Thin Ore Bodies":

Effectively solve the problem of using tracklessequipment for mining low-grade thin orebodies, improve production efficiency, reducecosts, revitalize low-grade resources, andenhance resource utilization value."Deep Hole Combined Mining and SubsequentFilling Method for Gently Inclined Multi-layer Loose and Broken Ore Bodies": Achieveintegrated innovation in mining processes,further increase production capacity whileimproving mining efficiency, and optimizemining operation processes.

Conduct research on the collaborativedevelopment of rail and trackless mining,define reasonable intervals and operatingmethods, and create a collaborativedevelopment pattern that not onlyreduces safety risks, improves workingenvironments and conditions, butalso enhances the quality of economicoperations, to lay the foundation for astrategic shift to trackless mining.

In 2024, the Company actively advanced digital construction, closely followed the digital cloud tin model "OneMap, Two Lines" for overall layout and phased implementation, and made significant progress in several keyareas: The integration of business and financial digitization across the tin industry chain, centered on ERP,has been comprehensively improved, while the digital manufacturing system, led by the MES managementsystem, has been gradually established. The connection between ERP and MES allows "digital intelligence" tobe integrated into key production processes, with the CNC rate of key equipment in major processes reaching

75.23%, achieving an intelligent upgrade from "manual control" to "digital control". We achieve the integration

of the office network and control network, establish an intelligent dispatch center and data center; build variousmonitoring and remote control systems, create a 3D visualization platform, and strengthen safety control andenergy management. Moreover, we also enable information systems to realize remote monitoring of equipmentand data sharing; build a private cloud data center, apply multiple business systems, and improve productionefficiency and management levels.

Digitalization Construction

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Yunnan Tin Company Limited2024 Sustainability Report

· Supported by an advanced technology platform and combined with the Company's needs, the ERP system

realizes vertical integration, horizontal integration, enhanced control, and real-time insights, stronglysupporting the Company's operational management.

· In financial management, the system significantly reduces manual voucher entry, improves financial work

and settlement efficiency, optimizes report generation processes, and reduces overdue accounts receivable;in procurement management, it optimizes business processes, improves work efficiency, shortensprocurement cycles, and reduces procurement costs; in inventory management, it shortens inventoryturnover days and reduces inventory waste and transportation costs.

ERP System

· The platform builds an information control system based on the "Platform + Application" model, developsmultiple mining-specific configuration tools, and creates a highly configurable digital mining developmentapplication platform.· It has core functions such as data collection and modeling analysis, and can realize the automation,

structuring, and standardization of data management, providing reliable data support for productiondecision-making.

Mining MES System Collaborative Control Platform

· The platform builds a system module ecosystem, focuses on solving the problems of decentralized

traditional enterprise information systems, inconsistent data, and low management efficiency, and achievesseamless integration with overall business related to information systems. In core business, it achievesfull industry chain coordination from mining, selection, inspection, to sales, effectively avoiding operationseparation and data distortion issues.· The platform breaks down barriers between various links in the industry chain, initially realizes "one systemmanaging production", and gradually builds into a personalized, integrated, multi-business managementsystem, significantly improving the Company's management efficiency and operational efficiency.

Indium on Cloud MES Platform

· The system is a core component of the key technology R&D project for intelligent production lines in tin

smelting based on the industrial internet.· Selected as a typical case for digital transformation by the China Association for Public Companies, the

system is awarded the Excellent Case of "Digital Transformation of Listed Companies" by Securities Daily.

Tin Smelting MES System

Some Digital Management Systems

UnitIntelligent Mine Construction GoalsOperation Results

Datun TinMine

To complete the construction of the "One Network"which involves hundreds of kilometers of opticalcables, over 70 core devices, and more than 1,000access terminals.

A unified transmission network and theintegration of the office network and controlnetwork have been realized, improving thereliability of the information technologyinfrastructure.To use automation and remote controltechnologies to build a standardized data centerand an intelligent integrated dispatch commandcenter.

Unmanned operation has been realizedin production auxiliary systems such ascompressed air, ventilation, water supply, andhigh-voltage power supply and distribution.To take the Mining Execution System (MES)platform at the core, and fully promote theconstruction of a digital mine.

The full-process management of productionoperations has been realized.

LaochangBranch

To successfully build an energy consumption onlinemonitoring platform, safety control platform, andother equipment control layer systems, as well asa centralized power control system, remote controlsystem for air compressors, etc.

The remote control of undergroundventilation fans, water pumps, and otherequipment has been realized.To initially build a 3D visualization integratedcontrol platform.

The remote visual supervision of mine safetyproduction has been realized.To build underground "three major safety"systems, slag slope online monitoring system, andtailings pond online monitoring system.

The branch has realized the positioning andcommunication of underground personnel,and the monitoring of toxic and harmfulgases, slag slope and pit wall displacement,and tailings pond safety.

KafangBranch

To build systems such as the 2,000 t single copperflotation machine liquid level automatic control,crushing system, intelligent management of truckscales, electricity consumption data collection,unmanned power station, unmanned backwatersystem pump station, and remote centralizedcontrol of fans.

The remote monitoring and intelligentcontrol of production equipment have beenachieved, improving production efficiency.

To establish "three major" systems forunderground safety and an online monitoringsystem for tailings ponds.

Strong support has been provided for minesafety production.

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Yunnan Tin Company Limited2024 Sustainability Report

Construction of Intelligent Mines by Branches (Subsidiaries) in 2024

In 2024, Tin Branch devoted itself to building the "5G+Cloud Tin Intelligent Smelting Plant", to deeplyadvance the digital transformation of manufacturing, and further enhance the Company's productionefficiency and management reform. The Tin Smelting Intelligent Manufacturing Demonstration FactoryProject (Phase I) was selected as one of "Lighthouse Factories" supported by the 2024 Yunnan ProvincialManufacturing High-Quality Development Special Fund. The "Indium on Cloud MES Platform" won theBest Practice Award for Digital Transformation by the China Association for Public Companies, providing amodel for the industry's digital and green transformation.

5G Empowers Intelligent Smelting and Leads the Industry's Digital TransformationCase

The "Indium on Cloud MES Platform" wasrecognized as the "Best Practice Model Case" ofthe (Third) 2024 Digital Transformation of ListedCompanies in China.

In November 2024, four technological projects ofTin Branch won the Technology Progress Awardfor Yunnan Tin Group Holding Co., Ltd.

The "First Global Unmanned Tin Re?ning SystemBased on 5G+AI Technology" project won thesecond prize at the 7th "Blossom Cup" 5GApplication Collection Competition.

Key Performance

Tin Branch's "5G+Cloud Tin Intelligent SmeltingFactory" was selected as one of the 30 nationalexcellent cases for the 2023 Digital and GreenCollaborative Transformation Development andone of the 57 provincial excellent cases for 2023,becoming a key showcase at the 2024 "Digital China"Construction Summit to highlight the achievementsin digitalization and intelligence in tin smelting.

UnitIntelligent Mine Construction GoalsOperation Results

HualianZincIndium

To establish a private cloud data center, andachieve full fiber optic coverage of the basiccommunication network across the entirecompany.

The centralized data management andefficient transmission have been realized.

To build the MES integrated business informationplatform, open-pit mining truck scheduling system,etc.

The intelligent control and optimizedscheduling of the production processhave been realized, improving productionefficiency and safety management levels,with an expected 500% increase in productionmeasurement and statistics efficiency.

To realize data integration and sharing.

The integration and sharing of data inareas such as mining production, qualityinspection, sales, cost, equipment, inventory,personnel, and payroll have been mostlycompleted, and the data can be minedand analyzed according to management'srequirements. Over 80 business analysisreports are automatically generated, withreport efficiency transitioning from thetraditional manual mode to real-timeautomatic generation and sharing.To expand the coverage of the DCS AutomationControl System.

The remote startup, monitoring, control, andshutdown of equipment have been realized,effectively improving equipment operatingefficiency and production metrics.

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Yunnan Tin Company Limited2024 Sustainability Report

The Company, addressing the issues of heavy reliance on manual labor, low efficiency, high safety risks, andinsufficient informatization in the tin ingot storage and logistics process, has built an intelligent tin ingotwarehousing system. This system automates the entire process of tin stack offline transfer, storage, outbound,and loading, along with intelligent equipment scheduling and information management, and enables datainteraction with the existing production control system. The construction of the intelligent warehousing systemnot only improves the Company's production efficiency, reduces costs, and enhances competitiveness, butalso provides a model for the intelligent transformation of storage in the non-ferrous metal industry, promotingthe industry's development toward digitalization, automation, and intelligence. It has a positive significancefor optimizing industry supply chain management and improving overall operational levels.

5G Empowers Intelligent Warehousing of Tin Ingot and Drives E?cient Transformation and DevelopmentCase

Intelligent Warehousing System Contributing to E?cient OperationsIntelligent Warehousing Construction and Results

Intellectual Property Management System

5G Intelligent Warehousing

Data Interaction and Software ManagementStorage Planning and Function Implementation

3000t + BufferStorageDesign

StorageCapacityAssurance

Full-processAutomatedManagement

ProductionEfficiencyImprovement

Expansionof LoadingFunctions

WCS Equipment

SchedulingManagement

WMS IntegratedInformationManagement

PreciseInventoryManagement

Increasing tin ingot warehousing efficiency by morethan 80%; improving inventory counting efficiencyby 30%; raising inventory accuracy rate by 15%;enhancing individual performance by 10%; reducingenergy consumption by more than 3%.

Providing precise decision-making production basis forenterprise production; improving management's rapidresponse ability, and reducing enterprise costs.

Reducing quality defects by 20%; improvingdata integrity by more than 20%; loweringequipment maintenance costs by more than 5%;raising labor productivity by more than 10%;increasing the product capacity and process datamanagement informatization level by 15%.

EfficientEquipmentCoordinationImprovementof LoadingEfficiency

PreciseDataSupport

Impact, Risk, and Opportunity Management

In the technology-driven development process, the Company has keenly realized the critical importance of riskmanagement for innovation activities. To ensure the sound promotion of technological innovation, effectiveprotection of R&D achievements and smooth and safe technology transactions, the Company has constructed acomplete and detailed intellectual property management system.

· Analysis for Novelty Search· R&D Tracking and Protection

· Review for Technology Introduction· Review for Export and Construction· Review of Joint Venture and Cooperation

· Standardization of Patent Application· Management of Trade Secrets

· Infringement Response Mechanism· Improvement of Contract Clauses

Classi?ed Protection of R&D ResultsFull-Process Management ofTechnological Innovation

Risk Prevention and Control of Technology

Transactions

Infringement Response and Contract

Management

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Yunnan Tin Company Limited2024 Sustainability Report

Metrics and TargetsThe Company encourages various types of innovation, respects intellectual achievements, focuses on protectingintellectual property, and continuously invests resources in innovation.In 2024, the Company was granted 52 new patents, including 20 invention patents and 32 utility model patents, and

40,00030,00020,00010,000

-

2022

27,257

24,548

39,747

20232024R&D Investment in the Last Three Years

(RMB 10,000)

Quality Management System Certification

awarded a patent bonus of RMB 118 thousand. By theend of 2024, the Company had held 374 valid patents,including 110 invention patents and 264 utility modelpatents.In 2024, the Company organized and implemented 37first-class science and technology projects, 197 second-class science and technology projects, and won 2provincial and ministerial-level science and technologyawards.In 2024, the Company's R&D investment was RMB 397.48million, an increase of 61.92% on a year-on-year basis.In the future, the Company will continue to increaseits investment in R&D, ensuring that the ratio of R&Dinvestment to main business revenue remains above 2%.

Product and Service Safety and Quality

As an key player in the industry, the Company understands that ensuring the high-standard safety and excellent qualityof products and services is not only a key manifestation of fulfilling corporate social responsibility but also an importantcornerstone for driving steady business growth and enhancing market competitiveness. The Company has established astrict quality management system to ensure product quality while using continuous improvement as the driving force tocontinuously enhance service quality, meet and exceed customer expectations, and achieve sustainable development.

Quality Management

Quality is a key element of core competitiveness and the cornerstone of business development. Yunnan Tin activelyresponds to and fully implements a series of plans such as theThree-Year Quality Improvement Action Plan. Wealso have developed a series of systems, including theQuality, Environment, Occupational Health and Safety, andEnergy Management Manual, theQuality Management Regulations, theStandardization Management Measures, andtheQuality Management Assessment Measures, to strengthen the effective operation of the quality managementsystem. Additionally, the Company relies on intelligent factories and intelligent enterprise construction to establishan MES quality module, achieving mechanized, automated, and information-based control of quality inspection,comprehensively improving the level of quality management.

Governance

公司知识产权管理体系

ExcellencePursuit

IntegrityAdherence,

LawCompliance

PeopleOrientation

EnergyConservation,Low Carbon

GreenDevelopment

「"a Topic of Double Materiality"」

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Yunnan Tin Company Limited2024 Sustainability Report

In 2024, the Company implemented a series of comprehensive and systematic measures centered around qualitymanagement, aiming to improve product quality, meet customer needs, and achieve the Company's quality andbusiness objectives.

Strategy

Key Optimization Measures for Quality Management in 2024

· The Company implemented the system holding theresponsible persons and the Chief Quality Officeraccountable for product quality and safety. Throughstandardized documents such as the System Manual andthe Process Procedure, the quality responsibilities andobjectives at each level are clearly defined.· Each department and subsidiary broke down qualityresponsibilities and objectives to the grassroots level,while establishing an assessment mechanism and aperformance management system with grape charts.Regular supervision, assessment, and enforcementof rewards and penalties ensured the effectiveimplementation of quality responsibilities.

· Comprehensive testing and monitoring wereconducted from production materials tofinal products. Based on the PDCA process,risk points were identified, workflows werestreamlined, and scientific managementsystems and operational mechanisms wereestablished.· Process product quality indicators forthe smelting production process weredetermined, and inspections were organizedin comparison with third-party qualityinspection agencies to improve inspectionand analysis quality.

Improving the Quality ManagementResponsibility System

Strengthening Quality ProcessControl

The Company's subsidiaries including Tin Branch, Hualian Zinc Indium, and Datun Tin Mine

have passed CNAS certification.

· Quality and metrology management ledgers were

established to collect and analyze monthly data inaspects such as product and process quality, rawand auxiliary material quality, customer complaints,product delivery inspection quality control pass rate,and incorporate data into performance evaluations.Corrective actions for non-conformity were formulatedbased on the analysis results, to promote stableimprovement in product quality throughout theproduction management process.· Quality objectives were reviewed and revised basedon data and actual conditions, to ensure that productquality remains stable and reliable, align with marketdemand and the Company's development strategy, andsafeguard the achievement of the Company's qualityand business Goals.

· The Company focused on customer needs,and integrated quality philosophy intothe production process. Employees' skillsand quality awareness were improvedthrough activities such as skill competitions,knowledge sharing, QC team activities, andteam building, to provide support for qualitymanagement.

Promoting Data-Driven Quality Improvementand Goal Optimization

Improving All Employees' QualityManagement Awareness

In 2024, Hualian Zinc Indium launched desulfurization and quality improvement technological upgradesfor iron ore. Faced with the situation where the increase in the iron grade of the raw ore led to higher tincontent and a significant loss of tin in the iron concentrate, the Company explored and adopted magneticpyrite activators and efficient collectors. By combining fine grinding, flotation, and magnetic separationprocesses, the Company achieved efficient mineral separation. After the improvements, the iron contentand sulfur content of the iron concentrate after weak magnetic separation increased, while the tin andarsenic content decreased. Some tin metal in the tailings could be re-selected, and the product qualitywas significantly improved. Resource utilization was enhanced, and the market competitiveness of theproduct was strengthened, providing a reference example for quality and efficiency improvement in themining industry.

Iron Ore Desulfurization and Quality Upgrade Unlocked New Value of Existing ResourcesCase

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Yunnan Tin Company Limited2024 Sustainability Report

In 2024, the Company established a quality improvement team. Through initiatives such as improvingco-line production, optimizing the electrolyte circulation process, introducing advanced equipmentand conducting regular maintenance to promote equipment upgrades, organizing multi-level employeetraining on product quality, improving the quality control system, strictly controlling raw material quality,and increasing inspection frequency, the Company actively worked to enhance the quality of cathodecopper products. In 2024, the Company's cathode copper product quality was significantly improved, withthe A-grade copper product rate rising from 93.9% to 99.25%, customer satisfaction reaching 100%, andthe economic benefits increased significantly. This not only enhanced the Company's competitivenessbut also provided high-quality raw materials to downstream industries, helping to drive technologicalprogress and quality improvement in the industry.

Multiple Measures were taken to Improve Cathode Copper Quality and Created a New High in the IndustryCase

Cathode Copper Process Optimization

Cathode Copper Equipment UpgradesCathode Copper Equipment Upgrades

Training on Product Quality

In 2024, the Company actively carried out diversified training activities to improve its quality managementlevel. Training sessions were organized on aspects of basic quality management knowledge, technicalreinforcement and safety knowledge, covering fields such as quality management systems, quality controlmethods, and more. Various specialized training activities were held, including internal audit training forquality and environmental systems, metrology knowledge training, and more, with a series of QualityMonth activities held in September. Employees were also encouraged to participate in the nationalquality management knowledge competition. Through these trainings, employees' quality awarenessand professional skills were significantly enhanced, laying a talent foundation for ensuring product andservice quality and improving the overall competitiveness of the Company.

Diverse Training Empowered and Improved Employees' Quality Management AwarenessCase

Promotion and Training for the Quality Month EventKey PerformanceIn 2024, the Company offered 6 quality training sessions, with a total of 10, 725 person-times ofparticipants.

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Yunnan Tin Company Limited2024 Sustainability Report

In 2024, the Company launched the Quality Management (QC) Team initiative, encouraging departmentsand units to autonomously form QC teams and adopt quality management improvement techniques andstatistical analysis methods to address quality and cost issues in the production and operation process, andadopted the PDCA method to carry out activities. In 2024, the QC team initiative proceeded smoothly, witha success rate of over 80%, creating annual benefits of more than RMB 30 million. Some QC results wereselected as typical industry cases for publicity purpose. This initiative helped us improve product and servicequality, enhance core competitiveness and establish a good brand image, providing a successful example forindustry quality management.

QC Team Activities Empowered and Created a New Height in Quality Management

Case

Key Honors

The Company's QC Teams and Units Received Provincial, Industrial and

Even National Recognition in 2024

In February 2024, the Shanghai Futures Exchange announced that the "YT" zinc ingot (ZN99.995) produced byWenshan Zinc Indium had been registered with the Shanghai Futures Exchange. Meanwhile, our tin ingots receivedthe China Four-Star User Satisfaction Product Certificate, while copper cathodes and zinc ingots received the ChinaThree-Star User Satisfaction Product Certificate.

Key Honors

The Products of the Company Were Awarded the "User Satisfaction

Certificate" by the China Association for Quality

103104

Yunnan Tin Company Limited2024 Sustainability ReportBased on systems such as theNon-conforming Product Management Process, theCustomer Complaint HandlingProcess (for Trial Implementation), theMeasures for the Administration of Product Return (Replacement), theCompany clearly defines the management organization, responsibilities, and processing procedures for productreturns and recalls, and establishes a quality complaint management system. This ensures that when productsare returned or recalled due to quality, packaging, market, or other reasons, we can handle customer complaintsefficiently, take legal liability for quality damage compensation, protect customers' rights and interests, andsafeguard the reputation of the Company.

Classi?ed Handlingof Complaints

Quick Response,Communication and Handling

Customer complaints are classified intogeneral complaints, important complaints,and major complaints, and targeted handlingstrategies have been developed accordingly.

Once a customer complaint occurs, the salesunit promptly feeds the customer's claim backto the production unit.

The production unit immediately organizesrelevant personnel for self-inspection, checks,and analysis, and comprehensively identifiesthe root cause of the problem.

Through reply letters, phone calls, remoteonline meetings, and other methods, theCompany maintains close communicationwith the customer, provides explanations,and promptly updates the customer onthe progress and results of the handling,improving customer satisfaction.

Sales units, production units, and the marketoperations center are responsible for handlingcomplaints against their respective unitsor organizations according to the relevantregulations. Upon receiving a complaint, theypromptly contact the relevant responsibleperson to cooperate and handle the complaint,ensuring clear responsibility and efficiency inthe complaint handling process.

Quality Complaint Management System

In August 2024, after receiving a quality complaint regarding tin ingot products, the Company's QualitySupervision Department took immediate action. Through investigating production and inspectionrecords, retesting retained samples, and other methods of self-checking, the issue was initially identifiedas possibly related to the customer's testing methods. After multiple communications with the customer,the professionals proposed a solution to lend the branch's standard samples to the customer forsimultaneous testing. Ultimately, the customer confirmed that the product quality was fine, withdrewthe return request, and returned the standard samples. This handling effectively resolved the customer'sconcerns, protected the Company's reputation, avoided economic loss, and demonstrated the Company'scommitment to product quality and efficient complaint handling capabilities.

E?cient Handling of Quality Complaints Maintained the Company's ReputationCase

Yunnan Tin deeply recognizes the importance of product quality risk management. To effectively respond to potentialrisks and protect product quality and brand reputation, the Company has established a quality management systemcovering the entire product lifecycle, from raw material procurement and production processing to after-sales services.From the four dimensions of "Plan - Implement - Check - Improve", the Company systematically identifies and strictlycontrols risk points during implementation, striving to provide customers with products of excellent quality and reliablesafety, thereby laying a solid quality foundation to support the Company's steady progress in the market.

Impact, Risk, and Opportunity Management

Raw Material and Auxiliary Material Management

Production Process Management

By formulating theMeasures for the Administration of Raw Material Acceptanceand theList of Key Materialsand Execution Standards, the Company clearly defines the quality requirements and acceptance standards forraw materials and production auxiliaries, controlling product quality from the source.

The Company identifies the key processes and quality control points in the production process, and formulatestheWork Instructions and the Operating Proceduresto precisely control the technical parameters of productionprocesses, product quality standards, and qualification rates. Moreover, the Company has established a systemfor monthly workshop checks, quarterly department checks, and annual company-wide checks to ensure thestability of quality in the production process.

Product Lifecycle Quality Management System

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Yunnan Tin Company Limited2024 Sustainability Report

The Company strictly controls product and service quality, and values product and service quality as a corecompetitive advantage.Goals and Indicators

ObjectivesAchievementSmelting Process Product QualityQualification Rate ≥91%

The Smelting Process Product Quality Qualification Rate was 97.04%Smelting Product Internal Control

Qualification Rate >97%

The Smelting Product Internal Control Qualification Rate was 99.91%Major Equipment Integrity Rate

>97%

The Major Equipment Integrity Rate was 99.95%National Sampling Product Pass

Rate = 100%

The Product Factory Pass Rate was 100%; and the National Sampling

Product Pass Rate was 100%Customer Dispute Resolution Rate

= 100%

The Customer Dispute Resolution Rate was 100%, 0 major quality

complaint occurred, and the Product Recall Rate was 0%

Quality Goals and Achievements in 2024

Customer ServiceGuided by the principle of "providing first-class service quality for customers", the Company provides tin ingotbundling or retail service based on customer demands. For customers purchasing our tin ingots, we offer themsupporting services for copper, indium, zinc, and silver raw materials and products. To improve after-sales service,the Company has developed a Customer Complaint Handling Process to classify complaints into general, important,and major complaints for targeted handling. Sales Units, Production Units, and the Market Operation Center areresponsible for handling complaints raised against them respectively, and collaborating with relevant persons incharge to resolve problems and improve customer satisfaction.

Key PerformanceIn 2024, the Company entrusted a third party to conduct a customer satisfaction survey on tin ingots, cathodecopper, and zinc ingot products, achieving a comprehensive satisfaction score of 97.19.

Quality Inspection and Non-conforming Product Handling

Ex-factory and After-sales Management

The Quality Supervision Department is responsible for sampling, testing, and evaluation of raw materials,intermediates, and finished products. In accordance with the Measures for the Administration of Non-conformingProducts, all non-conforming raw materials, intermediates, and products are isolated, labeled, recorded, andproperly disposed of to prevent them from entering subsequent processes or being used for unintended delivery.

Product inspection before delivery follows internal control standards that are stricter than nationalstandards, to ensure that only high-quality products are delivered to customers. After delivery, theCompany continuously monitors product usage and customer experience. Through visits, surveys,phone communication, and satisfaction surveys, the Company collects customer feedbacks and needs tocontinuously improve product quality.

The Company Received the Excellent Contribution Award for Outstanding Supply Chain

Partner from Customers.

Key Honors

Customer Complaint Handling Process

Receive customercomplaint information

Analyze causes and offer

solutions

Documentation

Provide feedback onspecific situations, andcoordinate internallywithin the unitAccept complaints,record customerfeedbacks andrequirements

Accept complaints, fill outwork orders, and recordcustomer feedback issuesand requirements

Analyze and processissues

Follow up with customers

Give feedback onspecific situations, andcoordinate cross-unithandlingProvide feedbackto relevant units ordepartments based oncomplaint content

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Yunnan Tin Company Limited2024 Sustainability Report

Data Security and Customer Privacy Protection

In recent years, the Company has effectively utilized digital technology to improve production and operationalefficiency, reduce management costs, and advance the Company's digital transformation and upgrade. To strengthendigital management and reduce data security-related risks, the Company has formulated the Digital ManagementMeasuresin accordance with theNetwork Security Law of the People's Republic of China, theData Security Law ofthe People's Republic of China, theMeasures of Security Assessment for Data Exportand other laws and regulations.This further standardizes the Company's data security protection efforts, safeguarding the interests of both theCompany and its customers.

The Company has established a Cybersecurityand Informatization Leading Group (the"Cybersecurity Leading Group"). The Company'sSecretary of the Party Committee and theChairman of the Board of Directors serve asthe Leader of the Cybersecurity Leading Group.The Company's Deputy Secretary of the PartyCommittee and Deputy General Manager (incharge of informatization) serve as the ViceLeader of the Cybersecurity Leading Group. Themembers of the Cybersecurity Leading Groupinclude the heads of departments (centers) at theheadquarters of the Company.

The main responsibilities of the CybersecurityLeading Group include: implementing thenational guidelines, policies, laws, regulations,and the work requirements of the holdingcompany regarding cybersecurity andinformatization development; making decisionsand coordinating discussions on the Company'scybersecurity and informatization developmentwork; researching, formulating, and guiding theimplementation of the Company's cybersecurityand informatization development strategicplan; coordinating and managing significantmatters and key tasks regarding the Company'scybersecurity and informatization development;establishing a coordination mechanism for theCompany's cybersecurity and informatizationwork; and approving the Company's softwarelegalization plan.

Those in charge are accountableThose who build are accountable

Those who operate are accountableThose who use are accountable

DigitalManagementPrinciples

Digital Management Principles

Organizational Structure and Responsibilities for Digital Management

Regulations on Data Security Management

Each unit shall manage its data assets by classification and grading in accordance with the Data SecurityLaw of the People's Republic of China, and implement different security protection strategies andtechnical measures for different levels of data.Each unit shall clearly define the purpose and use of data collection to ensure the legality, necessity, andbusiness relevance of data collection.

Each unit shall meet confidentiality and data de-identification requirements when providing data toexternal units for business purposes, and sign confidentiality agreements if necessary.

Each unit shall establish a data backup and disaster recovery mechanism, perform local backups andremote disaster recovery for important data and application systems, and regularly conduct backuprestoration drills to ensure backup effectiveness.

Each unit shall implement comprehensive data security control measures, and strictly approve operationsrelated to important data, such as access, modification, deletion, transmission, import, and export.

Each unit shall apply technical measures such as data transmission encryption, data storage encryption,data leak prevention, and business confidentiality protection to ensure the security of important data.

When computer terminals and peripherals need to be sent for external repair, data backup and clearingmeasures shall be taken, and security checks shall be conducted before reconnecting to the officenetwork. During software maintenance, on-site operations personnel from the unit shall be present.Equipment disconnection from the network shall be handled securely.

Computer terminals and devices with storage media that are to be discarded shall be disposed of ina unified manner. Before disposal, proper data backup and clearing measures shall be taken, and ifnecessary, hard drives, storage cards and other devices shall be dismantled.

The important data of each unit is, in principle, stored within the territory of China, and if provided abroadas required, such data shall be approved by the competent authority in accordance with the relevantrequirements of national departments.

Systems that store employee personal information shall comply with national laws and regulationsrelated to personal information protection. It is strictly prohibited to illegally sell or provide employeepersonal information to others.

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Yunnan Tin Company Limited2024 Sustainability Report

Through a series of cybersecurity technologies, the Company collects network traffic in real-time, analyzes andpredicts network threats and risks in real-time, reduces network threats and risks, improves the efficiency anddefense capability of the Company's network security management, and ensures the safe and stable operationof the Company's business systems.

Measures to Ensure Information and Data Security

Next-Generation

Firewall

SituationAwarenessSystem

Zero-Trust

Gateway

Log Audit

EndpointDetection andResponse (EDR)

Key Performance

In 2024, no data security incidents or customer privacy leakage incidents occurred in the Company.In 2024, the Company offered4 training sessions on data security and customer privacy protection and carriedout1 related emergency drill.

In September 2024, the National CybersecurityAwareness Week kicked off in HongheAutonomous Prefecture. The Company wasinvited to attend the opening ceremony of theevent and actively participated in subsequentcybersecurity activities. The event themed"Cybersecurity Serves the People, CybersecurityRelies on the People" extensively promotedcybersecurity knowledge and awareness,improved the public's cybersecurity awarenessand skills, and created a strong atmosphereencouraging the whole society to jointly build aline of defense for cybersecurity.

The Company Participated in the National Cybersecurity Awareness Week Event to Jointly Create aLine of Defense for CybersecurityCase

The Company Participated in the Opening Ceremonyof the Cybersecurity Awareness Week Event

In April 2024, an online knowledge lecture on the standardization of network data security in cybersecuritywas launched by Honghe Autonomous Prefecture. The Company organized relevant personnel to activelyparticipate in the lecture. The lecture mainly interpreted the standards such as theData Security Technology- Rules for Data Classification and Grading, theData Security Technology Data Security - Risk AssessmentMethods, theInformation Security Technology - Personal Information Security Specification, and theInformation Security Technology - Security Impact Assessment of Personal Information, as well as the"Zhu Wang 2023" Industrial Network Security Drill Report, and organized relevant technical personnel toanalyze the process of attack-defense drills. This lecture enhanced the professional knowledge and skills ofinternal personnel, ensuring stricter adherence to applicable laws and regulations in digital operations, whilemitigating data security risks to protect organizational and client interests.

The Company Participated in a Knowledge Lecture on Data Security to Enhance Internal Data SecurityManagement.Case

The Company Organized Relevant Personnel to Attend an Online Knowledge Lecture on Network DataSecurity Standardization

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Supply Chain Due Dilligence

GovernanceThe Company understands that supply chain management and risk control are key elements of corporate corecompetitiveness. To ensure the stability and timeliness of raw material supply while controlling costs, the Companyhas established regulations such as theMeasures for the Administration of Procurement Activities, theMeasures forthe Administration of Suppliers, theMeasures for the Administration of Electronic Procurement Platform, and theMeasures for the Administration of Procurement Review Expert. In supplier management, the Company implementsa supplier grading system and evaluates suppliers' performance and capabilities in all aspects. In addition, theCompany continuously optimizes the supply chain due diligence system and strictly controls supply chain risks.Through a systematic management strategy, the Company has enhanced its ability to withstand risks and provides asolid guarantee for the Company's sustainable development.

Develop supply chain due diligence policies, establish an internal managementstructure, build a supply chain control and transparency system, strengthencooperation with suppliers, and establish an appeal mechanism.Due DiligenceManagement System

Insist on risk prevention as the main focus, formulate risk mitigationmeasures, track and monitor risks, and consult stakeholders' opinions.Risk Prevention andMitigation

Release the annual report of supply chain due diligence

Communication and ReportAbout Risk ManagementProcesses and Results

Continuously collect information, fully utilize identification tools, conductcompliance reviews of information, update supplier records, and acceptappeals from stakeholdersRisk Identification

and Assessment

Implement internal evaluation - due diligence performance management;external evaluation - third-party evaluationInternal and External

Evaluations

Provide conditions or cooperate to carry out remedies in a timely mannerRemediation

"Six-Step" Supply Chain Due Diligence System Process

「"a Topic of Double Materiality"」

Supplier Performance Evaluation DimensionsProductQuality

DeliveryAccuracy

After-salesSupportDeliveryTimeliness

EmergencyGuarantee

SafetyProduction

IssueHandling

Strategy

The Company has developed systems such as theSupply Chain Due Dilligence Manual - Tinand theSupplier Codeof Conductto conduct comprehensive, systematic, and dynamic management and supervision of suppliers. Thisensures that suppliers remain in a controllable, compliant, and high-quality state throughout the cooperationprocess, establishing a solid foundation for the supply chain security of the Company.

Increase the proportion of supply to end

customers

Expand the supplier base for key and special

materials

Enhance the scale benefits of centralized

procurement

Prevent imbalance in the number ofsuppliers and supply structure

Prevent insufficient competitionPrevent supply monopolies

Supplier Development DirectionActive MeasuresPreventive Measures

Supplier Development Direction

Transparent Procurement Mechanism

The Company establishes a procurementmanagement system of "headquarter decision-making, unified management, and gradedresponsibility", and implements procurementmanagement according to the principle ofseparating decision-making, management,implementation, and supervision.

The Company has established "One Platform" and"One Mall" unified supplier management, adheredto the underlying logic of the separation of powers,implemented a procurement risk control system,increased procurement sourcing efforts, andcontinuously optimized the business environment.Additionally, we require our registered suppliers tosign the Commitment to Compliance and Integrity,continuously promoting transparent procurement.

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Impact, Risk, and Opportunity Management

With increasing external environmental uncertainties, supply chain risk management has become an indispensable partof corporate strategic planning. The Company consistently upholds a rigorous business philosophy, incorporating supplychain risk management into its comprehensive risk management system. Through scientific process design and efficientmanagement mechanisms, it ensures the efficient operation of the supply chain and manageable risks. We are committedto establishing long-term, stable, and mutually trusted relationships with suppliers. Through collaborative managementand innovative practices, we jointly address various potential risks, ensuring the resilience and competitiveness of thesupply chain and laying a solid foundation for the sustainable development of the Company.

To meet the demands of globalizationand understand the global mineral supplychain due diligence requirements, as wellas the market and customers' expectationsfor compliance construction in upstreamsmelting plants, the Company offeredtraining on supply chain due diligence andcompliance construction in August 2024. Thistraining covered topics such as internationallaws and regulations, global mineralcompetition, and supply chain governance,helping the Company learn and masterways to address supply chain compliancechallenges and improve its capabilities inmineral supply chain due diligence.

The Company Offered Training on Supply Chain Due Diligence and Compliance Construction toEnhance Management Capabilities.Case

The Company O?ered Training on Supply Chain DueDiligence and Compliance Construction

Management Measures for Supply Chain Risks

The Company systematically collects and organizes informationand reports from UN agencies, government departments, industryorganizations, and non-governmental organizations, analyzing riskpublic opinion related to the Company. Providing key support forthe compliance review of the Company's tin-containing materialprocurement business, further ensuring the stability and continuityof the supply chain.

Strengthening Risk Management in the Procurement Review for Tin-Containing

Materials to Ensure the Safety and Compliance of Procurement Activities

Requirements for Supply Chain Due Dilligence

When conducting procurement or businessactivities in "conflict-affected and high-risk areas",we neither tolerate nor profit from, assist, support,or facilitate any party in implementing: any form oftorture, cruel, inhuman, or degrading treatment;any form of forced or compulsory labor. Forcedor compulsory labor refers to any work or serviceextracted from any individual under the threat ofpunishment, which the person does not voluntarilyprovide; the worst forms of child labor; other severehuman rights violations, such as widespread sexualviolence; war crimes or other serious violationsof international humanitarian law, crimes againsthumanity, or genocide.

We prohibit providing direct or indirect supportto public or private security forces that illegallycontrol mining sites, transportation routes,and upstream entities in the supply chain,such as illegally imposing taxes or demandingmoney or minerals at mining site entrances,along transportation routes, or at mineraltrading points, or imposing illegal taxes orextorting intermediaries, export companies, orinternational traders.

We will not tolerate providing direct orindirect support to non-state armedgroups through mineral extraction,transportation, trade, processing, orexport. The act of "providing direct orindirect support to non-state armedgroups through mineral extraction,transportation, trade, processing, orexport" includes, but is not limited to,purchasing minerals from non-statearmed groups or their affiliates, makingpayments to them, or providinglogistical support, equipment, or otherassistance.

We will not offer, promise, engage in,or demand any bribes, and we resisttemptation. We will not bribe to concealor falsify the origin of minerals, or tofalsely report taxes, fees, and royaltiesthat shall be paid to the government formineral extraction, trade, processing,transportation, export, etc.

Requirements Regarding Serious InfringementsRelated to Mineral Extraction, Transportationor Trade

Requirements Regarding Public or PrivateSecurity Forces

Requirements Regarding Director Indirect Support to Non-StateArmed Groups

Requirements Regarding Bribery,Corruption, and FraudulentMisrepresentation of Mineral Origin

Metrics and TargetsThe Company continuously promotes the healthy development of the supply chain from bottom to top, maintaininga good industry chain ecosystem.In 2024, the Company achieved a100% signing rate for the Supplier Compliance and Integrity Commitment Letter.

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Open, Fair, and Just Recruitment Process

Employees

EmploymentThe Company firmly implements the "talent-driven development" strategy, and adheres to the principles ofopenness, fairness, justice, and merit-based selection in talent recruitment. we strictly prohibit the employmentof child labor and forced labor, oppose all forms of discrimination, and insist on building a diverse talent system.Moreover, we value internal human resources, regularly analyze internal human resource needs, and activelypromote talent mobility, to ensure the efficient utilization of talent within the Company.

A high-quality and diverse workforce is not only the key to achieving the Company's strategic goals but also animportant manifestation of the Company's social responsibility. The Company regards talent management as a keypart of its operations and is committed to establishing a complete and efficient management system in employeerecruitment, rights protection, development and training, as well as occupational health and safety. This ensures thatthe legal rights and interests of every employee are fully respected and protected, and that employees are offeredopportunities to realize their personal value and career growth.

Recruitment Principles of HR Department

AdoptingMulti-Faceted

Approachesand Multiple

Measures

SeekingTalent withMorality andCompetenceWhile GivingPriority to

Morality

Ensuring Open,

Fair, Just andMerit-BasedRecruitment

Inroducingboth Talent and

Intelligenceand Prioritizing

Equally both

Human and

IntellectualResources

· The Company shall clearly define recruitment plan, procedures, information release, recruitment discipline,

supervision channels, and other recruitment requirements.· The recruitment plan shall not lack details such as the recruitment positions and conditions, number ofrecruits, recruitment schedule, and recruitment methods.· Recruitment information shall be publicly released through channels such as government websites,company websites, employer websites, third-party service agency websites, broadcast TV, newspapers,magazines, new media, etc.

· The Company shall:

· Never set any discriminatory conditions based on ethnicity, race, gender, religious beliefs, etc;· Never set any conditions unrelated to recruitment positions;· Never set limits such as graduation schools, household registration, marital status, etc.;· Never lower or raise any recruitment conditions in the same recruitment batch;· Post the recruitment results on the Company's official website, bulletin board, or other public media, disclosethe contact phone number and address of the disciplinary department for reporting and supervision, andensure the announcement period is no less than 7 days.

Open Recruitment

Fair and Just Recruitment

The Company implements periodic human resourceinventories, regularly conducts surveys of human resourceconditions in each department and subsidiary, collectsand grasps human resource demand information in atimely manner, analyzes the objectivity and necessityof the demands, and provides internal human resourcesupply and demand information to each department andsubsidiary. The Company also supports and services themovement of internal human resources.

After analysis and assessment, ifthe Company determines that somepositions can be prioritized by internalstaff transfer or competitive openselection to meet the demand, it willproactively communicate and coordinateto efficiently utilize existing humanresources.

Efficient Utilization of Internal Human Resources

Key Performance

In 2024,The total number of employees in the Company was13,247, of which 11,516 were local employees, accountingfor

86.93%;

The proportion of full-time employees was100%;The number of newly hired employees was163;The turnover rate of employees (including retired employees) was

5.16%.

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MaleFemale

GenderCompositionof Employees

EducationalBackgroundof Employees

AgeCompositionof Employees

Master's degree or AboveAbove 50 years oldBachelor30-50 years oldCollege degree or belowUnder 30 years old

2,825

21.33%

0.70%

2,525

19.06%

1,373

10.36%

2,331

17.60%

9,543

72.04%

10,629

80.24%

10,422

78.67%

NumberProportionNumber of Employees of Minority Nationalities4,77136.02%Number of Employees with Disabilities1150.87%

Number of Veteran Employees6224.70%

Employment of Relevant Employees in 2024

Protection of Rights and InterestsThe Company always adheres to the "people-oriented" philosophy. We are committed to building a fair, transparent,and competitive compensation system. Through a diversified salary structure, we ensure that employees' hard work isreasonably rewarded and provide employees with smooth performance appeal channels. The Company places greatimportance on employees' welfare protection, constantly improving welfare policies, and providing comprehensive careand support to help employees achieve a balance between work and life. We strictly abide by and implement the policiesand regulations set by the higher authorities, such as theMeasures for Pairing Assistance of Employeesin Difficulty and theMeasures for the Administration of Archives of Employees in Difficultyamong other 9 policies aimed at helping employeesin need, providing comprehensive guarantee for the Company's employees facing difficulties.

Remuneration Structure and Influencing Factors

Position

Salary

Performance-

related Pay

Position ValueWork PerformanceWorking Competency

Company PerformanceDepartment PerformanceIndividual Performance

Pension insurance, work injury insurance,medical insurance, maternity insurance,unemployment insurance, housing providentfund, enterprise annuity, employeesupplementary medical insurance, regular healthchecks for employees, employee medical mutualassistance, accident insurance, etc.

Paid annual leave, sick leave, marriage leave,bereavement leave, maternity leave, maternitycare leave, family planning surgery leave,breastfeeding leave, family visit leave, workinjury leave, etc.

InsurancesBenefits

Employee Welfare

After the performance evaluationresults are determined, thedepartment (center) head willprovide feedback to employeesand offer suggestions forimprovement.

If an employee disagrees with theannual performance evaluationresults, they may communicatewith the heads of the relevantdepartments (centers). If theissue cannot be resolved, theemployee can submit an appealin writing or through face-to-facecommunication to the HumanResources Department.

The Human ResourcesDepartment, together with theheads of relevant departments(centers) (and if necessary,the leaders in charge of thedepartments or centers), willreview the reasonableness of theappeal and respond accordingly.

Performance Appeal Mechanism

Employee Congress System

The Employee Congress is the basic form of democratic management in the Company andserves as the institution through which employees exercise their democratic managementrights. While establishing the corporate leadership structure and organizationalmanagement systems in accordance with applicable laws, the Company also establishesand implements a democratic management system based on the Employee Congress,adapting to the new changes brought by the corporate system, and actively exploring andpracticing new ways of democratic management.

Key PerformanceIn 2024, the Company assisted 503 employees in difficulty, with the fund for assistance amounting to RMB

1.8346 million. The employee social security coverage rate is 100%.

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In February 2024, the Company held the third meeting of the second Employee Congress, with 206participants. At the congress, the Company listened to and reviewed documents such as theMeasuresfor the Administration of Total Wages of Yunnan Tin Co., Ltd.and theMeasures for the Administrationof Performance Evaluation and Compensation of Middle Management of Yunnan Tin Co., Ltd.TheCompany received 9 proposals. During the proposal handling process, several issues concerningemployee protection were resolved, such as reducing manual labor intensity and opening channelsfor querying individual accounts of the Company annuity. The congress reflected the democraticnature of the Company's management, encouraged employees to actively participate in thediscussion and decision-making of company affairs, and enhanced employees' sense of belongingand responsibility.

In November 2024, the Company launched the winter action to address wage arrears. This action, basedon the general requirements of treating the source, preventing risks, strengthening supervision, severepunishment, and ensuring a bottom line, focused on the construction project field, ensuring that migrantworkers participating in the projects receive their due compensation in a timely manner. At the sametime, it ensures that cooperative units do not face wage arrears or major mass incidents, extreme events,or negative online public opinion caused by wage arrears. After the Company's inspection, Yunnan Tinand its affiliated units have paid migrant workers in accordance with the contractual agreements andproject settlement conditions, with no wage arrears. The action effectively protected the rights of migrantworkers, and maintained and enhanced the Company's brand image.

In 2024, the Laochang Branch provided work-study positions for the children of employees in difficulty,aiming to allow the children of these employees to receive living allowances while gaining workexperience. The act mainly arranged for the children of employees in difficulty to participate in taskssuch as organizing employee files and assisting with various aid projects. It also enabled the children ofemployees in difficulty to earn labor compensation and gain social practice experience, promoting thetransformation of the aid model from "blood transfusion-type" to "self-sustaining-type", demonstratingthe Company's original mission and commitment to serving and uniting employees through practicalactions.

The Company Convened the Employee Congress to Encourage Employees to Participate in theDecision-Making for Internal A?airs

The Company Addressed Wage Arrears to Protect the Rights and Interests of Migrant Workers

The Company Provided Work-Study Positions to establish a "Self-Sustaining" Assistance Mode

Case

Case

Case

In 2024, to continue implementing the "1+10" assistance service system for employees in difficulty,the Company launched the Golden Autumn Education Assistance Activity to actively help families ofemployees in difficulty alleviate the financial strain of their children's education. The event providedfinancial subsidies to 47 children of employees in difficulty who participated in the high school or collegeentrance examinations and were admitted, with a total subsidy of RMB 267.5 thousand, including RMB

80.3 thousand from the Company It also effectively reduced the financial burden on families of employees

in difficulty, reflecting the Company's care for its employees and allowing them to focus more on theirwork with peace of mind.

The Company Launched the Golden Autumn Education Assistance Event to Reduce the FinancialBurden on Families of Employees in Di?cultyCase

In July 2024, the Company organized the "Union Warmth Reaches Thousands of Families" sendingcoolness activity. This activity provided cooling and heat-relieving "coolness packages" to 10,821 frontlineemployees who work in high (low) temperature environments, high-altitude environments, or harsh, dirty,tiring, and dangerous job positions. The packages contained cooling devices, cooling products, summerbeverages, and other materials. The total expenditure for the activity was RMB 1.069 million. This activityreflected the Company's concern and respect for its frontline employees and enhanced employees' senseof belonging and recognition.

The Company conducted the "Sending Coolness" Event to Enhance Employees' Sense of BelongingCase

The Company Organized the "Sending Coolness" Event

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In 2024, the Company carried out warmth-giving activities for employees in difficulty, retired personnel, andfrontline employees on the New Year's Day, the Spring Festival, the Mid-Autumn Festival, and the National Day.During the activities, the Company's representatives engaged in an in-depth communication with the recipients,acknowledged the contributions made by employees to the Company's development, distributed consolationfunds and gifts, and extended holiday greetings and blessings. A total of 327 people were comforted, furtherenhancing employee happiness and increasing the Company's cohesion and centripetal force.

In March 2024, the Laochang Branch invited a professional doctor to hold a female health knowledge lecturetitled "Caring for Women's Health, Sharing the Sunshine of Life". More than 70 female employees participatedin the lecture. The lecturer, using a combination of images and text, combined clinical experience and real-lifecases to provide a detailed introduction to the symptoms and dangers of breast cancer. After the lecture, breastcancer early screening was conducted for the female employees present. The lecture promoted healthy livingfor women, raised the self-protection awareness of female employees, and enhanced their ability to preventdiseases, reflecting the Company's deep care for female employees.

The Company Carried Out Warmth-Giving Activities on Holidays to Further Enhance EmployeeHappiness

The Company Held a Female Health Knowledge Lecture to Raise Female Employees' Self-ProtectionAwareness

Case

Case

The Company Carried Out Warmth-Giving Activities on Mid-Autumn Festival and National Day

The Laochang Branch Organized a Female Health Knowledge Lecture and Breast Cancer Screening

Development and TrainingIn 2024, the Company continued to optimize the talent development environment, create a talent developmentatmosphere of "respecting labor, respecting knowledge, respecting talent, and respecting creativity", fully leveragethe role of outstanding talents as models and leaders, and strengthen the construction of the cadre talent team. Wealso promoted the integrated development of talent "attraction, training, and utilization" with the goal of learningwhat is lacking and being practical and effective. The Company adheres to the principle of "Focusing on InternalTraining, Supplementing with External Training", increasing the intensity of categorized, layered, and graded trainingfor employees, continuously improving the comprehensive quality and business skills of the workforce.

The Company and its affiliated units have

established a "multi-channel" career

development system for employees. The

headquarters has divided all positions into

management and professional sequences.

The management sequence consists of 5

levels, while the professional sequence

consists of 8 levels. Employees in the

management and professional sequences

may switch development sequences upon

meeting the corresponding conditions.

Employees in the professional sequencecan qualify for salary adjustments andcareer development points through annualperformance evaluations, obtainingprofessional titles/professional (vocational)qualifications, further education,receiving competition awards, and beingrecognized with honors. When their careerdevelopment points reach a certain score,they can trigger a salary increase.

Career Development System

Talent Development Reward Scheme

The Company's talentdevelopment rewards areavailable for external talentrecruited and internaltalent trained in house.

Internal talent trainedincludes four categories:

national talent, provincialtalent, technical talent, andhigh-qualification talent.

External talent recruitedincludes three categories:

national talent,provincial talent, andhigh-educated talent.

To strengthen, optimize and support the cadre talent team for the high-quality development, the Company hasconducted a special talent team survey within its affiliated units. Through interviews, surveys and talent inventorymodels, the Company guides its affiliated units to establish, improve and dynamically manage talent pools.

Talent Pool Mechanism

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Key PerformanceIn 2024, the Company spent RMB 13.6857 million on employee training, and offered 9,251 training sessions,with a100% employee training coverage rate.

By the end of 2024, there were834 talents in talent pools. TheCompany carried out dynamic management of its talent pools in 2024.

In 2024, a total of 93 applications for talent development rewards weresubmitted, with the amount of reward totaling RMB

1.496 million.

The total training duration for employees amounted to599,281 hours, namely, 129,515 hours for femaleemployees and469,766 hours for male employees.The average training duration per employee was

45.24 hours, namely, 45.85 hours for female employees and

45.07 hours for male employees.

Training ProgramsTypes of TrainingTargeted traineeTin Talent Plan

Ability Improvement Training forProfessional Technical Backbones

Professional technical backboneLeap Plan2024 Newcomer Training CampNewly hired college graduatesElite Plan

Business Knowledge Training inProfessional Management Fields

Business backbones in professional management

fields

Craftsman Plan

Skill Improvement Training for High-

Skill Talent

Senior workers and skilled operatorsTraining on Three Positions Safety

Technologies

Unit heads, safety management personnel,

special operations personnelProfessional Skills TrainingSkilled operators

Employee Training Plan i 2024

In July 2024, the Company invited experts in system certification to conduct training on systemcertification standard requirements, with 279 employees participating. Through key pointsorting, case interpretation, discussions, and exchanges, the Company employees systematicallyunderstood the core content of system management, strengthened their understanding of thenecessity and importance of establishing and implementing the "Four Systems," enhanced theCompany's personnel awareness of quality, environment, occupational health and safety, andenergy management, and helped employees improve their management abilities.

In June 2024, the Company organized training on customs affairs and advanced enterprisecertification, with 47 employees participating. This training invited experts in the field to explainthe origin and trade agreements, origin certificate visa practices, origin certification, and AEOcertification enterprise supply chain security to employees, strengthening their ability to analyzeand solve problems in this area, further developing employees' thinking and knowledge systems.

The Company Organized Training on System Certification Standard Requirements to EnhanceEmployees' Management Ability

The Company Offered Training on Customs Affairs and Advanced Enterprise Certification toStrengthen Employees' Abilities to Analyze and Solve Problems

Case

Case

The Company Organized Training on System Certi?cation Standard Requirements

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Occupational Health and SafetyIn accordance with theLaw of the People's Republic of China on Prevention and Control of Occupational Diseases, theLaw of the People's Republic of China on Work Safety, and theMeasures for the Administration of Emergency ResponsePlans for Production Safety Accidents, the Company has developed systems such as the Measures for the Administrationof Occupational Health, the Safety Production Responsibility Regime and the Comprehensive Emergency Plan forProduction Safety Accidents, establishing a sound occupational health management and safety production managementsystem. The Company's Secretary of the Party Committee, Chairman, and General Manager jointly serve as the mainresponsible persons for safety production to strengthen the operation control of the safety production managementsystem, continually eliminating or reducing employees' occupational health and safety risks.Eliminating Fatal Accidents, Major TrafficAccidents and Major Fire Accidents

Preventing and Reducing InjuryAccidentsKeeping Injury Rate per Thousand Peoplein Aboveground Mining Units < 2%

Maintaining Injury Rate per ThousandPeople in Underground Mining Units < 5%Occupational

Health andSafety Goals

Health and Safety Dual Prevention MechanismIn terms of the occupational health and safetymanagement system, the Company hasestablished a unified set of 17 basic managementprocesses and 9 occupational health and safetymanagement processes. Related management andoperations are carried out according to the workmethods, content, and requirements of processmanagement. Through systematic and structuredmanagement control, various risks are effectivelymanaged and controlled.

In terms of safety standardization, all company unitshave completed safety production standardizationconstruction according to the 8 standard modulesand are operating regularly. The Company hasbasically achieved systematic occupational healthand safety management, standardized job operationbehaviors, intrinsic safety of equipment and facilities,and designated placement of work environmenttools, forming a self-management and self-improvement mechanism.

Occupational Health and Safety Management System CertificationKey Performance

In 2024,The work-related injury rate was 0.13%;The injury rate per million working hours was

0.67 person-times/million working hours;

The workdays lost due to occupational injury were7,156 days;The participants in safety training sessions were242,352 person-times;Invested RMB

266.7975 million in safety production;

The investment in occupational injury insurance investment was RMB

25.1461 million, with a coverage rate of 100% for all

employees;The investment in safety production liability insurance was RMB 1.6924 million, with a coverage rate of 100% for allemployees;In 2024, the Company did not have any major or above production safety accidents.In 2024, the Company organized 9,013 employees exposed to dust and toxins to participate in occupational health check-ups.Each subsidiary unit completed the detection, public disclosure, and reporting of occupational hazard factors for each position.In 2024, the Company organized 181 practical emergency drills, with 3,890 participants and observers. The Company alsoorganized 128 emergency training sessions for production safety accidents, with 4,891 participants.By the end of 2024, the Company had identified a total of 10,098 safety risks, with 554 new risks added in 2024, all of whichwere evaluated and classified.In 2024, the Company updated 42 safety risk four-color distribution maps based on changes in risk distribution.

Four-color map of Tin Branch security risks

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Yunnan Tin Company Limited2024 Sustainability Report

Management Measures for Safety Production in 2024

Safety Production Policy

Safety FirstPrevention ForemostComprehensive Governance

· Datun Tin Mine, Laofactory Branch, and Kafang Branch optimized the underground ventilation system· Datun Tin Mine promoted the application of lightweight mobile temporary support devices for

underground mining surfaces

· Hualian Zinc Indium completed the construction of the monitoring system for mine slopes and wastedumps and connected it to the provincial monitoring platform· Kafang Branch carried out special rectification for ramp safety and built flood interception ditches

Potential Hazard Identi?cation and Recti?cation, as well as Process System Safety Improvements

· Copper Branch explored and promoted the "safety lock" control method for high-risk operations,further improving the risk control level for high-risk operations

· Wenshan Zinc Indium relied on the safety and environmental control platform to establish an online

exam module for employee safety education and training and promotes its application

Exploration of Safety Management Models

· Wenshan Zinc Indium newly configured 6 sets of defibrillators and conducts operational skills training· Each unit is equipped portable leak detectors, emergency shower devices, air respirators, emergency

medications, and other types of emergency equipment and supplies based on the risk characteristicsof different positions and maintains daily maintenance

Increase of Investment in Emergency Equipment

In June 2024, the Company held Safety Production Month activities. The event themed "EveryoneTalks Safety, Everyone Can Handle Emergencies—Smoothing Life Channels" was carried out throughvarious forms such as "walking classrooms", setting up consultation desks, distributing safetyproduction knowledge handbooks, displaying popular science exhibition boards, interactive Q&A,and experience activities, to carry out safety production theme publicity and education. A totalof about 900 promotional materials were distributed, and 64 promotional exhibition boards weredisplayed, effectively raising employees' safety awareness and emergency response capabilities, andlaying a solid foundation for strengthening the Company's safety defense line.

The Company Organized Safety Production Month Event to Enhance Employees' Safety Awarenessand Emergency Response Capabilities.Case

Safety Production Month Event

In April 2024, the Company organized an event themed "Prioritizing Prevention, GuardingOccupational Health" to promote the Law of the People's Republic of China on Preventionand Control of Occupational Diseases. The event invited professionals to deliver lectures onoccupational health monitoring knowledge and occupational disease prevention and controlknowledge, along with practical demonstrations of emergency self-rescue and mutual rescue

The Company Organized Publicity for theLaw of the People's Republic of China on Prevention andControl of Occupational Diseases to Create an Environment Where All People Value Occupational HealthCase

Publicity for the Law of the People's Republicof China on Prevention and Control ofOccupational Diseases

skills. At the same time, the event used banners,screens, windows, and other promotional mediato publish occupational disease preventionand control knowledge, distributing 3,433related promotional materials, reaching anaudience of 10,247 people. This event not onlyimproved employees' occupational healthliteracy and emergency response abilities butalso created an atmosphere in which all partiesvalue occupational health, which is of greatsignificance for safeguarding employee healthand promoting enterprise development.

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Yunnan Tin Company Limited2024 Sustainability Report

Measures for the Administration of Training on Safety ProductionEmployees involved in safetytraining include primaryresponsible persons, safetyproduction managementpersonnel, specialoperations personnel, andother workers.

Employees whohave not passedsafety trainingare not allowedto work.

Employees shall receive safety training, be familiarwith relevant safety production regulations and safetyoperating procedures, possess necessary safetyproduction knowledge, master safety operating skillsfor their positions, understand emergency handlingmeasures for accidents, and get aware of their rights andobligations in safety production.

In December 2024, the Company organized asafety-focused training session for the mining andindustrial sectors, with more than 150 participants.This training covered topics such as safetyproduction-related laws and regulations, riskidentification and hazard investigation, emergencyplans, etc., helping various safety-relatedpersonnel further strengthen their awarenessof hazard prevention, improve the Company'sresponse ability when handling safety incidents,and ensure the Company's safe production.

The Company Conducted Specialized Safety Training to Enhance Hazard Prevention AwarenessCase

The Company Conducted Specialized SafetyTraining for the Industrial and Trade Sector

Emergency Response Plan for Production Safety AccidentAlert Evacuation

Quickly delineate the alert area, set up obvious markers such as warning zones, fences, etc.; evacuatepersonnel unrelated to emergency handling from the alert area, promptly notify units and personnel whomight be affected by the incident to reduce unnecessary casualties; deploy alert personnel, prohibit unrelatedpersonnel from entering the alert area; record and mark the original state of the accident site, protect theaccident scene and related evidence, and cooperate with the rescue team to organize rescue operations.Personnel Search and Rescue and Engineering Emergency RescueAt the first moment of an accident, carry out personnel search and rescue and engineering emergency rescue.Depending on the nature of the accident, bring special protective equipment, specialized tools, and safetyprotective clothing, and quickly reach the designated site. After the accident occurs, quickly control, clear,or isolate hazardous sources to prevent secondary accidents, while organizing the search and rescue ofendangered personnel. The initial response personnel at the scene cooperate with the rescue team to rescuethe injured in a timely manner, take necessary measures to prevent the accident's impact from expanding,and prevent secondary and derivative disasters from occurring.

Medical Treatment

Prepare relevant rescue equipment and medicines according to the information provided by the alarm andthe nature of the accident, quickly arrive at the designated site, provide immediate first aid and bandagingbased on the injured personnel's condition, ensure proper arrangements for their transfer to medical facilities,and avoid causing secondary injuries to the injured personnel when providing first aid and bandaging.On-site Monitoring and Environmental ProtectionStrengthen emergency monitoring of air, water, soil, etc. Based on the types, properties of pollutants, and the localnatural and social environmental conditions, define the corresponding emergency monitoring plans and methods,determine the monitoring locations and frequency, allocate emergency monitoring equipment and vehicles, andmonitor in a timely and accurate manner to provide a basis for emergency decision-making. Properly collect, clean,and safely dispose of toxic and hazardous substances, as well as fire-fighting wastewater, waste liquids, etc.Technical Support

The expert technical team analyzes the hazardous factors and risks within the impact range of the accident andproposes control measures; analyzes the development trend of the accident and proposes preventive measuresto prevent the accident from spreading; provides timely technical consultation for the rescue site; researches andproposes solutions for technical difficulties encountered during the on-site emergency rescue operation.

In June 2024, the Company conducted a joint emergency drill for a slope collapse accident at an open-pit mine. The drill simulated a slope collapse accident in an open-pit mine after continuous rainfall,resulting in the burial of some equipment and personnel being trapped in an emergency situation.Emergency personnel immediately took the corresponding actions according to the emergency planrequirements and successfully completed the drill. The drill further promoted the implementationof emergency management responsibilities, strengthened safety production responsibilities, andeffectively improved the emergency rescue capabilities for non-coal mining accidents.

The Company Conducted Emergency Drills for Production Safety Accidents to Improve EmergencyRescue CapabilitiesCase

The Company Conducted Emergency Drills for Production Safety Accidents

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Yunnan Tin Company Limited2024 Sustainability Report

Social Contribution

Conducting public welfare activities is an important manifestation of the Company's commitment to socialresponsibility. The Company continuously gives back to society in various ways, focusing on areas such as education,health, and elder care. In the education field, the Company cares about students' academic and living conditions;in health, the Company focuses on various groups in need of medical assistance; and in elder care, the Companyemphasizes both spiritual and practical support for the elderly. Through social welfare activities, the Company notonly contributes to society but also enhances employees' sense of social responsibility and team cohesion. TheCompany will continue to work hard, spreading love and warmth through practical actions, allowing the flower ofpublic welfare to bloom in more places.Key Performance

In 2024,1,059 person-times of employees participated in the volunteer activities;

The average volunteer service time was

216.8 hours per person.

In April 2024, the Laochang Branch conducted a volunteer service activity themed "True LoveWarms Children's Hearts and Devoted Companionship Ensures Their Healthy Growth" at anelementary school campus. During the activity, volunteers learned about the students' academicand living conditions, offered encouragement in their studies and daily lives, and provided themwith stationery, basketballs, and other items. The volunteer service activity aimed to care for thegrowth of students, help them establish a correct view of life, cultivate a positive and upliftingspirit, and demonstrate the Company's sense of social responsibility.

Laochang Branch Conducted Volunteer Activities to Care for Students' Learning and LifeCase

Laochang Branch Organized Campus Volunteer Service Activities

In September 2024, the Laochang Branch organized a voluntary blood donation activity, with 47employees participating. During the activity, employees followed the guidance of staff to completeprocesses such as form registration, physical examination inquiries, initial screening tests, and listenedattentively to the medical staff's explanations of blood donation knowledge and precautions, beforesuccessfully completing the blood collection. This voluntary blood donation fully demonstrated theemployees' high social responsibility, enthusiasm for public welfare, and willingness to contribute. TheCompany will continue to strengthen publicity efforts, encouraging more employees to actively participatein public welfare activities and demonstrate responsibility and commitment through action.

In October 2024, with the arrival of the Double Ninth Festival, Tin Branch organized an event themed"Filial Piety Comes First". The event provided the elderly with living supplies and holiday blessings,and invited an art troupe to perform a dance for the elderly. In addition, the event included a funquiz to educate the elderly on health and anti-fraud knowledge, as well as offering free medicalservices such as blood pressure measurements, supporting the elderly in maintaining a healthy life.The event reflected the Company's care for the elderly, showcased the Company's responsibility andcommitment, and further promoted the social ethos of respecting and caring for the elderly.

Laochang Branch Organized Blood Donation to Demonstrate Responsibility and Commitmentthrough Practical Actions

Tin Branch Organized the Elderly Care Event on the Double Ninth Festival

Case

Case

Laochang Branch Organized Voluntary Blood Donation

Tin Branch Organized the Elderly Care Event on the Double Ninth Festival

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Rural RevitalizationThe Company always considers consolidating and expanding the achievements of poverty alleviation and effectivelyconnecting them with rural revitalization as a top priority and a social responsibility it shall fulfill, firmly safeguardingagainst any large-scale return to poverty. The Company focuses on improving the development level of ruralindustries, enhancing rural construction standards, and advancing rural governance levels. We take measuresto promote continuous income growth for people lifted out of poverty, help rural areas achieve comprehensivedevelopment in ecological livability, thriving industries, and effective governance, so that the people in ruralrevitalization can have more sense of achievement and happiness.Key PerformanceIn 2024,The investment in rural revitalization amounted to RMB 1.9804 million;The number of people assisted reached5,491.

In 2024, the Company organized some of its grassroots units to participate in the "Purchase-for-Assistance" event in Mazong Village. The Company cooperated with the Lvxing Cooperative topurchase 25.24 tons of terraced red soft rice planted by poor households, at a total price of RMB367,300. The event effectively promoted the sale of local specialty agricultural products and helpedpoor households increase their income through consumption-based assistance. It further deepenedthe Company's connection with rural areas and consolidated the results of poverty alleviation.

The Company Participated in the "Purchase-for-Assistance" Event to Consolidate Poverty AlleviationAchievementsCase

The Company Participated in the "Buy Instead of Help" Event at Mazong Village

To achieve the goal of "building beautiful ecology and livable environment, helping peopleenjoy peace and prosperity in work and life", the Company invested RMB 552,400 to supportinfrastructure construction in 2024, which was used for the repair of infrastructure in fourvillages: Mazong Village, Shierjiao Village, Shangchenong Village, and Xiaboyi Village, includingthe construction of suspended road sections. The construction of the suspended road sectionaddressed the practical needs of the villagers, helped improve the local living environment,enhanced the quality of life of the people, and further promoted rural revitalization.

The Company Supported the Construction of Rural Infrastructures to Improve Local LivingEnvironmentCase

悬空路段建设情况

Industry Co-construction

The Company understands that the development of the industry relies on collaborative cooperation from all parties.Therefore, we treat small and medium-sized enterprises equally and actively collaborate with companies within theindustry and industry associations to jointly build a healthy and sustainable industrial ecosystem. By participatingin the formulation of industry standards, resource sharing, and technological exchanges, the Company helps theindustry break through bottlenecks and promote technological innovation. Moreover, we regularly participate inindustry exchange activities, build communication bridges, and promote the sharing of knowledge and experience.We firmly believe that only in an open and cooperative atmosphere can the industry thrive. In this process, we willrealize our own value and growth and make a greater contribution to the long-term development of the industry.

The Company firmly maintains a healthy industry ecosystem and treats small and medium-sized enterprisesequally. At of the end of 2024, the balance of accounts payable (including accounts payable notes) was RMB

1.4 billion, accounting for 3.82% of the total assets.

Accounts Payable and Overdue Payment

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Yunnan Tin Company Limited2024 Sustainability Report

S/NStandard Name/Relevant Content

Type ofStandard

OrganizationorParticipation

Compilation

Unit1Full English Translation of Tin Ingot

NationalStandard

OrganizationYunnan Tin

Green Factory Evaluation Requirements for Tinand Tin Alloy Production

IndustrialStandard

OrganizationYunnan Tin

Methods for Chemical Analysis of Cast BearingMetals – Part3: Determination of AntimonyContent – Cerium Sulfate Titrimetric Methodand Potassium Bromate PotentiometricTitration Method

IndustrialStandard

ParticipationYunnan Tin

Management Rules of Heavy Non-FerrousMetals Enrichment and Metrallurgy Balance

GroupStandard

ParticipationYunnan Tin5Copper Matte

GroupStandard

ParticipationYunnan Tin6Zinc Stannate

GroupStandard

ParticipationYunnan Tin

Methods for Chemical Analysis of Zinc Stannate– Part 1: Determination of Zinc Content -Potassium Iodate Titration

GroupStandard

Participation

Hualian Zinc

Indium

Methods for Chemical Analysis of Zinc Stannate– Part 2: Determination of Zinc Content -Na2EDTA Titration Method

GroupStandard

Participation

Hualian ZincIndium

Methods for Chemical Analysis of Tin – Part 1:

Determination of Copper, Lead, Zinc, Cadmium,Silver, Nickel and Cobalt Contents – FlameAtomic Absorption Spectroscopy

NationalStandard

OrganizationYunnan Tin10Tin Balls行业标准OrganizationYunnan Tin11Arsenic Trioxide

NationalStandard

ParticipationYunnan Tin

Specification for Limit on Harmful ElementContent of the Heavy Nonferrous MetalConcentrates

NationalStandard

ParticipationYunnan Tin13Stannous Iso Caprylate

IndustrialStandard

ParticipationYunnan Tin

Methods for Chemical Analysis of Copper,Lead, Zinc Original and Tailing Ores - Part 2:

Determination of Lead and Zinc Content -Na2EDTA Titration Method

IndustrialStandard

Participation

Hualian ZincIndium

Participation of the Company and its Subsidiaries in the Formulation and Revision of Standards in 2024

In November 2024, representatives of the International Tin Association visited the Company fora tour and exchange, discussing supply chain due diligence. During the visit, the guests touredthe Datun Tin Mine, Tin Branch, and conducted on-site inspections of the Intelligent OperationsCenter, the Top-Blown Furnace Main Control Room, the Tin Cultural Corridor, 5G IntelligentWarehousing, and the Raw Material Warehouse, gaining a deep understanding of the Company'smining, beneficiation, and smelting production processes. Both parties engaged in in-depthdiscussions on system optimization, risk management, and mining source conditions, andshared insights on how to improve the effectiveness of supply chain due diligence and promotecooperation and development among stakeholders. This further deepened mutual cooperationand consensus in the field of supply chain due diligence.

Representatives of the International Tin Association Visited the Company for Exchange andDiscussion on Industry DevelopmentCase

Representatives of the International Tin Association Visited the Company for Exchange

S/NStandard Name/Relevant Content

Type ofStandard

OrganizationorParticipation

CompilationUnit

Methods for Chemical Analysis of Copper,Lead, Zinc Original and Tailing Ores - Part 6:

Determination of Copper, Lead, Zinc, Nickel,Cobalt, Cadmium, Magnesium, Manganese,Arsenic, and Molybdenum Content - InductivelyCoupled Plasma Atomic Emission Spectroscopy

IndustrialStandard

Participation

Hualian ZincIndium

Technical Guidelines for the Construction of theDual Prevention Mechanism for EnvironmentalRisks in Industrial Enterprises - Identificationand Classification of Pollution Sources

GroupStandard

ParticipationYunnan Tin

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Yunnan Tin Company Limited2024 Sustainability Report

In May 2024, the 17th OECD Forum on Responsible Mineral Supply Chains was held in Paris,France. The forum, a major international event in the field of responsible business conduct,gathered international organizations, standard-setting bodies, auditing organizations, governmentdepartments, and upstream and downstream enterprises from the global mineral supply chain.The Company attended the forum and gave a presentation on the Company's supply chain duediligence system and responsible tin supply chain development. The Company advocated for

In May 2024, the International Tin Association held its first-half board meeting in Penang, Malaysia,and the Company attended the meeting. The meeting primarily focused on discussing the "Tin2030" strategy, elaborating on the work plan and measures of "Tin 2030" from the perspectivesof strategic framework, sustainable development, technology, and market information. As an

The Company Attended the OECD Forum on Responsible Mineral Supply Chains to PromoteHarmonious Industry Development

The Company Attended the Board Meeting of the International Tin Association to Showcase ItsThoughts on Industry Development

Case

Case

The Company Attended the 17th OECD Forum onResponsible Mineral Supply Chains

smelting enterprises to emphasize theimportance of mining resource sourceaudits, highlighted the feasibility ofstandards in different regions, andcalled for better communicationbetween standards and greaterrecognition across upstream anddownstream stakeholders to promoteharmonious industry development.

The Company Attended the Board Meeting ofInternational Tin Association

important producer in the tin industry,the Company expressed support forthe "Tin 2030" strategy, believing itprovides clear direction for the futuredevelopment of the tin industry. Inthe face of global warming, energytransformation, and the widespread useof smart devices, the tin industry needsto join global counterparts to embracenew opportunities and face newchallenges. The meeting demonstratedthe Company's reflection on industrydevelopment and the responsibility itbears as an important participant in theindustry.

IndexesGRI StandardsDisclosureRelevant Section

GRI 2: GeneralDisclosures 2021

2-1 Organizational detailsAbout This Report2-2 Entities included in the organization's sustainability reportingAbout This Report2-3 Reporting period, frequency and contact pointAbout This Report2-5 External assurance

Independent AssuranceStatement2-6 Activities, value chain and other business relationshipsAbout Us2-7 EmployeesEmployees2-9 Governance structure and compositionCorporate Governance2-10 Nomination and selection of the highest governance bodyCorporate Governance2-11 Chair of the highest governance bodyCorporate Governance2-12 Role of the highest governance body in overseeing themanagement of impacts

ESG Management2-13 Delegation of responsibility for managing impactsESG Management2-14 Role of the highest governance body in sustainability reportingESG Management2-16 Communication of critical concernsESG Management2-17 Collective knowledge of the highest governance bodyESG Management2-19 Remuneration policiesEmployees2-20 Process to determine remunerationEmployees2-22 Statement on sustainable development strategy

Message from theChairman2-25 Processes to remediate negative impactsCompliance Risk Control2-26 Mechanisms for seeking advice and raising concernsCompliance Risk Control2-27 Compliance with laws and regulationsCompliance Risk Control2-29 Approach to stakeholder engagementESG Management2-30 Collective bargaining agreementsEmployees

2024 Sustainability Report

Yunnan Tin Company Limited

GRI StandardsDisclosureRelevant SectionGRI 3: MaterialTopics 2021

3-1 Process to determine material topicsESG Management3-2 List of material topicsESG Management3-3 Management of material topicsESG ManagementGRI 201:

EconomicPerformance2016

201-1 Direct economic value generated and distributedPerformance in 2024201-2 Financial implications and other risks and opportunitiesdue to climate change

Addressing ClimateChange201-3 Defined benefit plan obligations and other retirement plansEmployeesGRI 203: IndirectEconomicImpacts 2016

203-1 Infrastructure investments and services supportedRural RevitalizationGRI 205: Anti-corruption 2016

205-2 Communication and training about anti-corruption

policies and procedures

Anti-Commercial Briberyand Anti-CorruptionGRI 207: Tax 2019

207-1 Approach to taxCompliance Risk Control

207-2 Tax governance, control, and risk managementCompliance Risk Control

GRI 302: Energy2016

302-1 Energy consumption within the organizationEnergy Utilization

302-3 Energy intensityEnergy Utilization

302-4 Reduction of energy consumptionEnergy Utilization

302-5 Reductions in energy requirements of products and

services

Energy Utilization

GRI 303: Waterand Effluents2018

303-1 Interactions with water as a shared resourcePollutant Emissions

303-2 Management of water discharge-related impactsPollutant Emissions

303-3 Water withdrawal

Water ResourceUtilization

303-4 Water dischargePollutant Emissions

303-5 Water consumption

Water ResourceUtilizationGRI 304:

Biodiversity 2016

304-2 Significant impacts of activities, products and services on

biodiversity

Ecosystem andBiodiversityConservation

304-3 Habitats protected or restored

Ecosystem andBiodiversityConservation

GRI StandardsDisclosureRelevant Section

GRI 305:

Emissions 2016

305-1 Direct (Scope 1) GHG emissions

Addressing ClimateChange305-2 Energy indirect (Scope 2) GHG emissions

Addressing Climate

Change305-4 GHG emission intensity

Addressing Climate

Change305-5 Reduction of GHG emission

Addressing Climate

Change305-7 Nitrogen oxides (NO

X), sulfur oxides (SO

X), and othersignificant air emissions

Pollutant Emissions

GRI 306: Effluentsand Waste 2020

306-1 Waste generation and significant waste-related impactsWaste Disposal306-2 Management of significant waste-related impactsWaste Disposal306-3 Waste generatedWaste Disposal306-4 Waste diverted from disposalWaste Disposal306-5 Waste directed to disposalWaste DisposalGRI 401:

Employment2016

401-1 New employee hires and employee turnoverEmployees401-2 Benefits provided to full-time employees that are notprovided to temporary or part-time employees

Employees401-3 Parental leaveEmployees

GRI 403:

OccupationalHealth andSafety 2018

403-1 Occupational health and safety management systemEmployees403-2 Hazard identification, risk assessment, and incidentinvestigation

Employees403-3 Occupational health servicesEmployees403-4 Worker participation, consultation, and communicationon occupational health and safety

Employees403-5 Worker training on occupational health and safetyEmployees403-6 Promotion of worker healthEmployees403-7 Prevention and mitigation of occupational health andsafety impacts directly linked by business relationships

Employees403-8 Workers covered by an occupational health and safetymanagement system

Employees

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2024 Sustainability ReportYunnan Tin Company Limited

GRI StandardsDisclosureRelevant SectionGRI 403:

OccupationalHealth andSafety 2018

403-9 Work-related injuriesEmployees403-10 Work-related ill healthEmployeesGRI 404: Trainingand Education2016

404-1 Average hours of training per year per employeeEmployees404-2 Programs for upgrading employee skills and transitionassistance programs

EmployeesGRI 405: Diversityand EqualOpportunity2016

405-1 Diversity of governance bodies and employeesEmployeesGRI 406: Non-discrimination2016

406-1 Incidents of discrimination and corrective actions takenEmployeesGRI 416:

Customer Healthand Safety 2016

416-1 Assessment of the health and safety impacts of product

and service categories

Product and Service

Safety and QualityGRI 418:

Customer Privacy2016

418-1 Substantiated complaints concerning breaches ofcustomer privacy and losses of customer data

Data Security and

Customer PrivacyProtection

Shenzhen Stock Exchange Self-RegulatoryGuidelines No. 17 for Companies Listed onShenzhen Stock Exchange—SustainabilityReport (for Trial Implementation)

ArticleRelevant Section

Chapter IIIDisclosure of Environmental Information

Article 22Addressing Climate ChangeArticle 23Addressing Climate ChangeArticle 24Addressing Climate ChangeArticle 27Addressing Climate ChangeArticle 28Addressing Climate ChangeArticle 30Pollutant EmissionsArticle 31Waste DisposalArticle 32

Ecosystem and Biodiversity

ConservationArticle 33

Environmental Compliance

ManagementArticle 35Energy UtilizationArticle 36Water Resource UtilizationArticle 37Circular Economy

Chapter IVDisclosure of Social Information

Article 39 Rural RevitalizationArticle 40Social ContributionArticle 42Innovation-Driven DevelopmentArticle 45Supply Chain Due DilligenceArticle 46Industry Co-constructionArticle 47

Product and Service Safety and

QualityArticle 48

Data Security and Customer Privacy

ProtectionArticle 50EmployeesChapter VSustainability-related Governance Information

Disclosure

Article 53Stakeholder CommunicationArticle 55

Anti-Commercial Bribery and Anti-

Corruption

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2024 Sustainability ReportYunnan Tin Company Limited

Independent Assurance StatementInfaith Group (hereinafter referred to as "Infaith") has been commissioned by Yunnan Tin Company Limited (hereinafter referredto as "Yunnan Tin") to conduct independent limited assurance of the environmental, social, and governance (ESG) data andinformation disclosed in Yunnan Tin's 2024 Sustainability Report (hereinafter referred to as the "Report"), and to present theassurance findings and conclusions to the Report's readers and stakeholders via this Independent Assurance Statement.Independence and Competence

1.All members of Infaith's assurance team have no commercial relationships with Yunnan Tin that could result in conflicts of

interest. Infaith has independently conducted this assurance engagement.

2.Infaith's assurance team comprises industry-experienced professionals who have received specialized training in internationally

recognized sustainability standards, such as the Global Reporting Initiative (GRI) Standards, AA1000AS v3, ISO 14001, ISO 26000,SA 8000, and the EcoVadis ratings for global supply chains. The team possesses comprehensive understanding and practicalexperience in applying international principles, evaluation frameworks, and verification standards.Assurance Statement

1.The management of Yunnan Tin is solely responsible for the preparation and content of the Report. Infaith's responsibility is to

conduct assurance within the scope described in this Statement and to provide professional assurance conclusions to the Report'sreaders and stakeholders.

2.Within the limitation of the scope of assurance, Infaith has performed independent limited assurance work and drawn conclusions

in accordance with AA1000AS v3 for matters within the defined scope of the Report. Except for providing independent assurance onverified facts related to these conclusions and issuing this Assurance Statement, Infaith assumes no legal or other responsibility forany inquiries for other purposes, nor to any other parties who may read this Independent Assurance Statement.

3.Any questions regarding the content or related matters of this Independent Assurance Statement shall be addressed by Yunnan Tin.

4.In case of any discrepancies between the Chinese and English versions of this Independent Assurance Statement, the Chinese

version shall prevail.Assurance StandardInfaith has applied the AA1000AS v3 (Type 2, moderate level of assurance), which includes evaluating Yunnan Tin's adherence toand the extent of its implementation of the four AA1000AS v3 principles: inclusivity, materiality, responsiveness, and impact.Scope of Assurance

1. 1. The assurance scope is limited to the information and data covered in the Report pertaining to Yunnan Tin and its subsidiaries,

excluding data and information from suppliers, contractors, or other third parties.

2. The AA1000AS v3 Type 2 Moderate level of assurance was employed to assess the nature and extent of Yunnan Tin's adherence to

the four principles outlined in AA1000AS v3.

3. Yunnan Tin and Infaith mutually agreed to select specific performance indicators from the Report for partial assurance. The

selected key performance indicators (KPIs) include:

● Investment in environmental protection ● Clean energy consumption ● Total exhaust gas emissions

● Total wastewater discharges ● Total number of employees ● Average training hours per employee

● Total investment in employee training ● Coverage rate of safety liability insurance ● Customer satisfaction

Assurance Procedure and Work PerformedTo obtain evidence supporting our conclusion, we performed the following work:

1.Interviews with senior management and staff of Yunnan Tin to gain an understanding of it's overall ESG practices and related

processes;

2.Verifying key organizational developments and policy implementations, as well as examining supporting evidence for the

assertions made in the Report;

3.Assessing the Yunnan Tin's key stakeholders, their expectations and concerns, communication channels, and Yunnan Tin's

responses through interviews and documentation review;

4.Selecting ESG-related disclosures in the Report and performed analytical procedures, evaluating overall performance, and

verifying consistency with the reported information;

5.Reviewing Yunnan Tin's reporting processes against the AA1000 principles of inclusivity, materiality, responsiveness, and impact

to assess the appropriateness of this Assurance Statement;

6.Conducting sample testing of supporting evidence to verify the reliability and quality of selected performance data;

7.Recalculating selected performance indicators to validate accuracy; and

8.Performing additional procedures as deemed necessary.

Conclusion

1.Based on the information provided by Yunnan Tin and our sample testing, we confirm that the Report contains no material

misstatements.

2.In accordance with the AA1000AS v3 principles of inclusivity, materiality, responsiveness, and impact, our detailed assurance

findings are as follows:

3.Based on the procedures performed and evidence obtained, we have no reason to doubt the reliability and quality of the selected

key performance indicators disclosed in the Report.LimitationThe assurance engagement was conducted within the scope and locations specified in the report; andAs there are no internationally recognized or universally applicable standards for the evaluation and measurement of non-financialinformation, the use of different but equally acceptable methodologies and measurement techniques may affect comparabilitywith other organizations.For any inquiries regarding this Assurance Statement, please contact us in the following ways:

Phone: 021-20740303E-mail: esg@infaith.com.cnAddress: 17F, Tower 1, Lujiazui Riverside Center, Lane 257, Binjiang Avenue, Pudong New Area, Shanghai, China

Authorized signature:

Infaith GroupShanghai, March 2025

Inclusivity

The Report demonstrates that Yunnan Tin has implemented key measures to engage stakeholders,understand their expectations and concerns, and facilitate timely communication on material topics. Theseefforts reflect a responsible and strategic approach to addressing ESG commitments.Materiality

Yunnan Tin has disclosed material topics that substantially influence its operations, stakeholders, decision-making, and performance. It has evaluated and enhanced its approach to managing these material topicsand related performance.ResponsivenessYunnan Tin has established policies enabling timely responses to stakeholders’ concerns.Impact

Yunnan Tin exhibits a robust capability to identify material topics and employs balanced, effective methodsfor assessment and disclosure. It has established systematic processes to monitor, measure, evaluate, andmanage impacts, supporting informed decision-making and transparent reporting of ESG performance.

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2024 Sustainability ReportYunnan Tin Company Limited

Reader Feedback Form

Dear readers,Hello!Thank you very much for taking the time to read the 2024 Sustainability Report of Yunnan Tin Co., Ltd. To provide youand other stakeholders with more valuable information and effectively promote the Company's improvement of ESGmanagement capability and level, we sincerely look forward to your feedback and suggestions.Multiple Choice (Please check √ in the appropriate box)

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3. How do you think Yunnan Tin has performed on environmental topics?

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6. Do you think the information, indicators and data disclosed in this report is clear, accurate and complete?

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Open-ended QuestionWhat are your opinions and suggestions regarding the ESG work of Yunnan Tin?