The investor relations activity record of Yunnan Copper for May 26–27, 2026 shows: 1 What is the company's planned copper concentrate production from captive mines this year, and what is the approximate cost level of the mining enterprises? According to the company's 2026 financial budget and production plan, full-year self-produced copper concentrates are expected to contain 69,800 mt of copper metal content. The company's current mining enterprises mainly include Diqing Nonferrous, Liangshan Mining, Yuxi Mining, and Diqing Mining. Due to differences in resource endowment and the life cycle stage of each mine, cost levels vary, with Diqing Nonferrous, Liangshan Mining, and Yuxi Mining having relatively lower costs. Meanwhile, the company strives to maintain overall cost stability through measures such as lean operations and increasing mining volumes. 2 What is the progress of the Hongnipo copper mine construction project of Liangshan Mining? The Hongnipo copper mine is currently under construction, with cumulative verified resource reserves of 16.06 million mt of ore, an average copper grade of 1.42%, and copper metal content of 592,900 mt. The project is progressing in an orderly manner as planned and is expected to be completed and ready for commissioning in 2026. 3 Will the mine resources under the company's major shareholder be injected into the publicly listed firm? Asset injection involves complex systematic work that requires comprehensive consideration of development strategy, asset conditions, regulatory requirements, and shareholder interests. The company will continue to focus on and strive to enhance the quality of the publicly listed firm, and if there are any new relevant arrangements, it will strictly follow prescribed decision-making and disclosure procedures. 4 Has the company set a target for resource self-sufficiency rate? The company regards improving resource self-sufficiency rate as an important long-term strategic task, relying primarily on three paths: commissioning of projects under construction, tapping potential of existing mines, and external resource acquisitions. Regarding projects under construction, the company successfully completed the acquisition of 40% equity in Liangshan Mining in December 2025, and the Hongnipo project is expected to be completed and ready for commissioning in 2026. Regarding tapping potential of existing mines, the company leverages its major mines to continuously intensify deep and peripheral exploration efforts, steadily advancing resource succession and reserve additions. Regarding external resource acquisitions, while managing existing mines and smelters well, the company actively monitors quality mineral resource projects and prudently conducts field trips and evaluations based on strategic positioning and market demand. 5 What proportion can the company's copper smelting TC long-term contracts approximately reach? The company follows the principles of marketization and maximization of comprehensive benefits in externally purchasing raw materials. As one of the larger copper concentrate purchasers in China, the company has long maintained good, stable, long-term cooperative relationships with major suppliers, and actively negotiates with copper concentrate suppliers to stabilize long-term contract supply and ensure orderly production. 6 What were the company's sulphuric acid selling price and production in Q1 2026? According to the company's 2026 production plan, planned annual sulphuric acid production is 5.76 million mt. In Q1 2026, sulphuric acid production progressed in an orderly manner as planned. Price side, as a by-product of copper smelting, sulphuric acid selling prices are influenced by multiple factors including regional market supply and demand, transportation conditions, and industry prosperity. Since the beginning of this year, driven by robust downstream demand and tight supply in some producing areas, sulphuric acid selling prices have stayed high. The company seized market opportunities, reasonably arranged production and sales, and made positive contributions to operating performance. Meanwhile, the company will continue to monitor price changes and dynamically optimize production and sales pace. 7 Does the company have further cost reduction plans? The company's mining and smelting enterprises continuously pursue lean cost reduction to build low-cost competitive advantages. For example, the company is comprehensively advancing the "Three-Year Cost Reduction 3.0" initiative, continuously promoting cost reduction and efficiency improvement, and lowering unit production costs through technological upgrades, process optimization, and improved management efficiency. 8 What major capital expenditures are expected in the future? The company's future major capital expenditures will primarily focus on the following strategic directions: first, resource acquisition—continuously strengthening exploration and acquisition of quality copper mineral resources in and outside China to enhance resource security capabilities; second, intelligent manufacturing—advancing automation, digitalization, and intelligent upgrades of mines and smelting plants to improve production efficiency and safety levels; third, green and low-carbon development—increasing investment in environmental protection, energy conservation, and other areas to promote sustainable development. Performance side: Yunnan Copper's Q1 2026 report disclosed on April 24 showed that the company achieved total operating revenue of 52.959 billion yuan, up 49.62% YoY; net profit attributable to the parent was 675 million yuan, up 7.93% YoY. Regarding the reasons for the increase in operating revenue, Yunnan Copper stated that it was mainly due to higher product prices compared to the same period last year and increased sales volumes compared to the same period last year. Yunnan Copper's 2025 annual report showed that in 2025, the company firmly established market entity awareness, strengthened its lean operations system, and solidly carried out production organization, cost control, indicator optimization, marketing value creation, and other work, with main product production reaching record highs and key technical and economic indicators continuously optimized. Full-year production included copper cathode of 1.6411 million mt, gold of 26.04 mt, silver of 735.38 mt, and sulphuric acid of 6.189 million mt, with copper cathode, gold, and silver production all reaching record highs. Full-year operating revenue reached 79.542 billion yuan and net profit attributable to the parent was 1.301 billion yuan, with operating efficiency steadily improving. Cost and technical indicators were continuously optimized, with mine concentrate copper content and smelting copper cathode unit full cost outperforming annual cost reduction targets. Key technical indicators for smelting and mining remained stable with improvement. In 2025, the copper smelting total recovery rate exceeded the target by 0.07 percentage points, and slag flotation tailings copper content was optimized by 0.01 percentage points versus the target, both reaching industry-leading levels. Yunnan Copper announced that in 2025, the company's concentrate copper content production, on a consolidated statement basis, was 69,400 mt, up 26.64% YoY from 2024, mainly because the company issued shares to acquire 40% equity in Liangshan Mining held by Yunnan Copper Group during 2025, and Liangshan Mining was included in the consolidated statements as of December 31, 2025, with its full-year production included in the statistics. Regarding the company's main businesses, Yunnan Copper introduced in its 2025 annual report: The company's main businesses cover copper exploration, mining and beneficiation, smelting, extraction of precious metals and rare scattered metals, sulphur chemicals, and trading. It is an important copper, gold, silver, and sulphur chemical production site in China. The company has established a relatively complete industry chain in copper and related nonferrous metals and is a copper enterprise with deep industry heritage. Main products include copper cathode, gold, silver, industrial sulphuric acid, and rare and scattered metal products such as molybdenum, platinum, palladium, selenium, and tellurium. The company's main products are all produced according to international standardization organization standards, operating effectively under the international ISO9001 quality management system to ensure strict quality control. The company's main product, copper cathode, is widely used in electrical, light industry, machinery manufacturing, construction, national defense, and other fields; gold and silver are used in finance, jewelry, electronic materials, etc.; industrial sulphuric acid is used as raw material for chemical products and in other sectors of the national economy. The company's "Tiefeng" brand copper cathode is registered on the Shanghai Futures Exchange and the London Metal Exchange; "Tiefeng" brand gold is registered on the Shanghai Gold Exchange (SGE) and the Shanghai Futures Exchange; "Tiefeng" brand silver is registered on the Shanghai Gold Exchange (SGE), the Shanghai Futures Exchange, and the London Bullion Market Association. Regarding the company's future development outlook, Yunnan Copper introduced in its 2025 annual report: Yunnan Copper adheres to the guidance of Xi Jinping Thought on Socialism with Chinese Characteristics for a New Era, fully implements the spirit of the 20th National Congress of the Communist Party of China and its successive plenary sessions, and upholds and strengthens the Party's overall leadership. The company actively serves major national strategies, adheres to promoting high-quality development as the theme, fully, accurately, and comprehensively implements the new development philosophy, continuously enhances core functions and improves core competitiveness, and better plays its role in scientific and technological innovation, industrial control, and security support in building a modern industrial system and constructing a new development pattern. The company emphasizes "two guarantees" (important mineral resource guarantee and important metal material guarantee), "two innovations" (scientific and technological innovation and management innovation), "two constructions" (strengthening Party building, especially cadre team building), and "three unwavering commitments" (unwavering in accelerating structural adjustment, unwavering in deepening enterprise reform, and unwavering in international operations and increasing "going global" efforts). The company focuses on "digital-intelligent transformation, expanding resources, refining mines, optimizing smelting, solidifying recycled (copper), and detailing rare scattered (metals)," accelerating the construction of a world-class excellent copper company, and continuously opening new prospects for Yunnan Copper's high-quality development. Guosen Securities' research report commenting on Yunnan Copper on April 11 showed: Quality asset consolidation. Production side, the company's copper ore production was close to 70,000 mt, with major mines maintaining stable production. Copper smelting side, after Southwest Copper reached full production, the company's 2025 copper cathode production was 1.64 million mt, up 440,000 mt or 36% YoY. During the reporting period, the company purchased 40% equity in Liangshan Mining through share issuance to its major shareholder, achieving consolidation. Liangshan Mining is a quality asset, with its mines featuring open-pit mining, abundant reserves, higher grade than the publicly listed firm's existing copper mines, and lower costs than the publicly listed firm's existing copper mines. In H2 2025, profitability of major subsidiaries generally declined. Although copper, gold, and silver prices rose significantly in H2 2025, the company's mining operations saw profit decline QoQ. Smelting operations also declined significantly in H2 2025, which was related to the sharp drop in copper concentrate TCs. As sulphuric acid prices are expected to stay high, the company's smelting business profitability is expected to improve. Gross profit by product side, the company produces over 6 million mt of sulphuric acid annually. Benefiting from sulphuric acid price increases, sulphuric acid business gross profit in 2025 was 2.03 billion yuan, up 1.5 billion yuan YoY, representing a performance highlight. Since early 2026, sulphuric acid prices have continued to rise, and this is expected to further boost earnings. Leveraging the copper industry's high-prosperity cycle in recent years, the company's asset quality has improved, and during the reporting period it achieved consolidation of Liangshan Mining, a quality asset. As the sole copper publicly listed platform under Chalco Group, injection of other quality assets from the major shareholder is anticipated. Although the copper smelting business is under pressure in the short term, the government has issued policies to strictly control new copper smelting capacity, and the company benefits from global copper smelting capacity rationalization, with a favorable long-term industry landscape. Maintain "Outperform" rating.

On April 21, a delegation from SMM Information & Technology Co., Ltd. (SMM), comprising Ye Jianhua, Director and Supervisor of SMM's Industry Research Department, Feng Chundi, Expert of SMM's Industry Research Institute, and Wu Tao, SMM's Overseas Marketing Manager for Copper and Tin, visited Lualaba Copper Smelter S.A. (LCS) for a field trip and exchange. The delegation received a warm and thoughtful reception from the leadership of LCS. During the exchange, relevant heads of LCS provided a detailed introduction to the project's construction history, smelting process routes, current capacity operations, and overall business planning. SMM, drawing on global non-ferrous market trends, shared insights on copper-cobalt raw material supply and demand, the smelting and processing landscape, price fluctuation trends, and industry policy developments. Both parties engaged in in-depth discussions on practical topics including pyrometallurgy production management outside China, raw material supply assurance, environmental protection operations and maintenance, cost control, and industry outlook assessment. They also exchanged experiences and ideas on overseas smelter operations management, risk prevention, and medium and long-term development planning. This field trip and exchange was pragmatic and efficient, effectively enhancing mutual understanding and laying a solid foundation for ongoing industry information sharing and long-term exchange and cooperation. Introduction to Lualaba Copper Smelter S.A. (LCS) Lualaba Copper Smelter S.A. (LCS) is a modern non-ferrous metal smelting enterprise jointly invested and constructed by China Nonferrous Metal Mining (Group) Co., Ltd. and Chalco Yunnan Copper Group, located in Kolwezi, Lualaba Province, DRC. Construction commenced in March 2018, and Phase I was completed and successfully put into operation in October 2019. It is the first large-scale pyrometallurgy copper-cobalt smelter in the DRC and serves as a key strategic pillar of China Nonferrous Metal Mining Group's resource development and industrial deployment in Africa. With copper concentrates smelting as its core business, LCS's main products include blister copper, sulphuric acid, and liquid sulfur dioxide, with an annual capacity of 150,000 mt of blister copper and 300,000 mt of sulphuric acid. As an important participant in the Belt and Road Initiative, LCS has consistently upheld the development philosophy of "serving the nation through resources and pursuing win-win cooperation," actively fulfilling its social responsibilities, promoting local employment and industrial development, and striving to build an internationally competitive copper smelter while continuously enhancing the influence of Chinese mining enterprises in the global non-ferrous metals industry. The conference is scheduled to be held on September 15–16, 2026 in Lusaka, Zambia. You are cordially invited to participate! Contact Person : Wu Tao: 18270916376 jennywu@smm.cn

On April 14, a delegation from SMM Information & Technology Co., Ltd. (SMM), including Ye Jianhua, Director and Supervisor of SMM's Industry Research Department, Feng Chundi, Expert at SMM's Industry Research Institute, and Wu Tao, SMM's Copper and Tin Overseas Marketing Manager, visited Chambishi Copper Smelter Limited (CCS) for exchange and survey. The delegation received warm hospitality from CCS's leadership. During the visit, both parties engaged in pragmatic communication based on their respective core businesses. Leveraging its core strengths in non-ferrous metal price index R&D, industry chain big data monitoring, copper market analysis and forecasting, in-depth industry research, and global non-ferrous resource connectivity, SMM shared insights on international copper market operating logic and price trend analysis with the enterprise, in the context of the current global copper smelting supply-demand pattern, raw material procurement landscape, and TC fluctuation trends. As a core copper smelting producer outside China, CCS provided a detailed introduction to its production and operation status, smelting process advantages, capacity release pace, raw material procurement, and product exports layout, and elaborated on the practical experience of ex-China copper smelters in production management, cost control, green production, and localized operations. Meanwhile, both parties exchanged views on common industry topics including development pain points of the copper smelting industry outside China, raw material supply security, finished product circulation and trade, industry policy changes, and low-carbon smelting development trends. They also reached preliminary consensus on future directions such as industry chain information sharing, market data exchange, joint market analysis, and industry resource coordination, laying a solid foundation for deepening regular exchanges and promoting high-quality collaborative development of the copper smelting industry chain. Introduction to Chambishi Copper Smelter Limited (CCS) Chambishi Copper Smelter Limited (CCS) is the first large-scale modern pyrometallurgy copper smelting enterprise invested by China overseas, entirely self-designed and constructed. Located in the Zambia-China Economic and Trade Cooperation Zone, the company has 170 Chinese staff and 1,600 Zambian employees. The company has always focused on its vision of "building an internationally first-class smelting enterprise with enduring prosperity," upheld the corporate spirit of "self-transcendence, continuous breakthroughs, and pursuit of excellence," benchmarked against first-class standards with meticulous craftsmanship, and continuously strengthened and optimized enterprise management, with its comprehensive competitiveness steadily improving. As of the end of 2024, the company had produced over 3.3 million mt of copper products and 8.7 million mt of sulphuric acid, with cumulative sales revenue of approximately $21 billion, effectively driving local economic development in Zambia and becoming a shining pearl along the Belt and Road! Enterprise History and Development Achievements (Pursuing Excellence, Benchmarking Against the Best and Forging Ahead) To extend the industry chain and retain more added value locally, in 2006, China Nonferrous Metal Mining (Group) Co., Ltd. cooperated with Yunnan Copper to introduce the advanced ISA copper smelting process to Zambia, with shareholding ratios of 60% and 40% respectively. From the design stage, the Company drew on successful experience in China and incorporated the characteristics of Zambian raw materials to re-optimize and re-innovate the key processes and technologies of the ISASMELT process, strengthening system integration. This resulted in multiple innovative achievements, including "Integration Innovation and Application of ISASMELT Furnace" and "Comprehensive Automated Control System," which were awarded the First Prize for Scientific and Technological Progress by China Nonferrous Metals Industry Association (CNIA) in 2010. The ISASMELT furnace campaign life broke world records multiple times, with the second campaign reaching 218 weeks and the third campaign reaching 244 weeks, establishing an international benchmark. In 2021 and 2022, the Company's copper production exceeded the designed capacity of 250,000 mt for two consecutive years, making history. In 2024, production further surpassed 260,000 mt, setting a new historical record. In September 2013, the Company was honored with the title of Advanced Collective of Central State-Owned Enterprises. In July 2021, it was successfully selected as a Benchmarking Enterprise under the administration of the State-owned Assets Supervision and Administration Commission of the State Council (SASAC). Process Flow (Dedicated and Professional, Striving for Excellence to Drive Development) The Company adopts the internationally advanced and mature process of "oxygen-enriched top-blown submerged bath smelting, electric furnace settling and separation, PS converter blowing, and anode furnace pyrometallurgy refining" to produce copper anode, and employs the "double-conversion double-absorption" process to produce sulphuric acid. Adhering to the concept of sustainable development, the Company has built a slag flotation recovery system with a daily processing capacity of 1,500 mt of furnace slag, and a bismuth recovery system with a daily processing capacity of 6 mt of flue dust, continuing to recover metals such as copper, cobalt, and bismuth from smelting slag and flue dust. Social Responsibility (Cooperation and Sharing, Giving Back to Society with Strong Responsibility) The Company actively practices its core values of "Dedication, Cooperation, and Sharing," consistently focusing on its core business of copper pyrometallurgy smelting, engaging in extensive cooperation with upstream and downstream clients, and sharing development achievements with employees and local communities. Since its establishment, the Company has cumulatively paid over $300 million in various taxes and fees in Zambia, created over 5,000 employment opportunities, and cooperated with more than 300 local suppliers, contributing to Zambia's green, harmonious, and shared development. The Company actively fulfills its social responsibilities by increasing investment in social welfare programs for local communities in Zambia, covering infrastructure, education, healthcare, and sanitation. These efforts include sponsoring the renovation of clinics in Kalulushi, supporting the Bushifire Orphanage, donating the construction of classrooms at Buyantashi School, Luato Market, Kankuko Bridge, Chibuluma Community Tennis Court, Chimfunshi Chimpanzee Rescue Center, and Modern Stars Football Club, among others. With a cumulative investment of over $4 million, the Company has earned high praise from local government and warm welcome from the public, establishing a strong corporate image. The Company actively promotes employee localization and continuously achieves skills transfer. The company invested over 5 million Kwacha, and externally carried out technical and non-technical training programs in electric welding, electrical power, pneumatics, technical control, management supervision, and equipment maintenance through the China-Zambia Vocational and Technical College, the TEVETA Fund, and other channels. Internally, through mentorship programs and other approaches, the company conducted business training in masonry, fitting, and other skills. The localization rate of the company's employees reached over 92%, the skills of local employees were significantly enhanced, and technical expertise was exported to the DRC. Vision and Outlook (Staying True to Our Original Aspiration, Building Tomorrow with a Shared Destiny) Innovation-driven development knows no bounds. Over the past decade and more, the company has upheld a sense of survival crisis and market competition awareness, adhered to innovation-driven development, and achieved high-quality growth. In 2021, the company's information technology infrastructure was completed and successfully put into use, with a commitment to building an automated, digitalized, and intelligent factory. In August 2023, the company's anode furnace pyrometallurgy refining system technical renovation project was completed and put into operation. In November 2024, the company's three-year action plan for technology-empowered safety and environmental protection was officially finalized, focusing on technology empowerment and fostering new quality productive forces, propelling the company's high-quality development to a new level. Through collaborative development, benchmarking against first-class standards, technological innovation, and increased production and efficiency, the company continues to advance toward its corporate vision of "becoming an evergreen, world-class smelter." The conference is scheduled to be held on September 15–16, 2026 in Lusaka, Zambia. You are cordially invited to participate! Conference Contact : Wu Tao: 18270916376 jennywu@smm.cn

The record of investor relations activities of Yunnan Copper from June 11 to June 13, 2025, recently released by Yunnan Copper, shows: Regarding the company's basic information, Yunnan Copper introduced: Yunnan Copper was listed on the Shenzhen Stock Exchange in 1998. Its main businesses cover copper exploration, mining, beneficiation, smelting, extraction and processing of precious metals and minor metals, sulfur chemical industry, and trade. It is an important production site for copper, gold, silver, and sulfur chemicals in China. Among them, the capacity for copper cathode is 1.4 million mt. The company is the only publicly listed firm in the copper industry of Chalco and China Copper. In Q1 2025, the company produced 348,900 mt of copper cathode, up 48.15% YoY; 5.80 mt of gold, up 95.63% YoY; 128.48 mt of silver, up 54.31% YoY; 1.3872 million mt of sulphuric acid, up 23.61% YoY; and 13,900 mt of copper in copper concentrates, down 15% YoY. At the end of Q1 2025, the company's total assets were 49.256 billion yuan, with an asset-liability ratio of 62.39%. It achieved an operating revenue of 37.754 billion yuan, up 19.71% YoY; a total profit of 922 million yuan, up 14.11% YoY; a net profit attributable to publicly listed firms of 560 million yuan, up 23.97% YoY; and a basic earnings per share of 0.2793 yuan, up 23.97% YoY. II. Q&A Session 1. In the face of the sluggish processing fee situation this year, what measures has the company taken to respond? Yunnan Copper stated: On the one hand, the company has strategically planned for "digital and intelligent transformation, expanding resources, refining mines, optimizing smelting, solidifying secondary (copper), and meticulously managing minor (metals)", and increased the extraction of urban mines and minor metals. On the other hand, in 2025, the company focuses on the key work of extreme operation, striving to promote high-quality development of the company, and advancing cost reduction with iron determination. After several years of cost reduction, quality improvement, and efficiency enhancement, the costs of the company's main products have certain competitiveness. In addition, the company has increased the profit contribution of by-products such as sulphuric acid, molybdenum, selenium, tellurium, platinum, palladium, and rhenium to enhance the company's comprehensive competitiveness. 2. What is the expected impact of the current smelting processing fees on the company's profits? Yunnan Copper stated: Since this year, long-term contracts and spot TC have seen significant declines compared to last year. The company has offset the adverse impact of the decline in processing fees through measures such as cost reduction, expanding procurement channels, and increasing direct supply of ore from mines. In addition, the company focuses on the layout of secondary copper and minor metals, while continuing to increase the profit contribution of by-products such as sulphuric acid, molybdenum, selenium, tellurium, platinum, palladium, and rhenium to offset the profit pressure caused by the decline in processing fees. 3. What is the approximate sales volume and price of sulphuric acid for the company this year? Yunnan Copper Science & Technology Development Co., Ltd. stated: Sulphuric acid is a by-product of the company's copper smelting process, and its price varies due to regional factors. In Q1 this year, the average price of sulphuric acid in major regions increased significantly YoY. The company actively seized market opportunities, contributing positively to its performance. 4. What efforts has the company made in resource acquisition? Yunnan Copper Science & Technology Development Co., Ltd. stated: The company attaches great importance to the replacement of mine resources and has increased capital investment to carry out comprehensive geological studies of various mining areas and exploration work in the deep and peripheral parts of mines. In 2024, the company invested 65 million yuan in exploration activities and exploration work in the deep and peripheral parts of mines, adding 91,800 mt of inferred and above copper resource metal content, achieving the annual target and realizing annual reserve increases greater than mine output consumption for four consecutive years. In addition, on the basis of managing existing mines and smelters well, the company actively focuses on high-quality copper resource projects. 5. The company announced its intention to issue shares to purchase a 40% stake in Liangshan Mining held by Yunnan Copper Group. What is the current progress, and what advantages will it bring to the company? Yunnan Copper Science & Technology Development Co., Ltd. stated: On May 13, 2025, the company issued the "Announcement on Suspension of Trading for the Purpose of Planning to Issue Shares to Purchase Assets and Raise Supporting Funds", indicating that the company is planning to issue shares to purchase a 40% stake in Liangshan Mining Co., Ltd. held by Yunnan Copper (Group) Co., Ltd. and raise supporting funds. Currently, the company and relevant parties are actively promoting various aspects of this transaction. Liangshan Mining is a copper resource production and smelting enterprise spanning the copper mining, beneficiation, and smelting industries, covering copper, iron, and sulphuric acid products. Liangshan Mining owns high-quality copper resources such as the Lala Copper Mine and Hongnipo Copper Mine, currently capable of producing approximately 13,000 mt of copper concentrates, 119,000 mt of copper anodes, and 400,000 mt of industrial sulphuric acid annually. Liangshan Mining is one of the core copper resource production and smelting bases under China Copper Corporation. As of the end of March 2025, the high-quality copper mine resources it holds, including the Hongnipo Copper Mine, Lala Copper Mine, and Hailin Copper Mine, have a copper metal reserve of 779,700 mt, with an average copper grade of 1.16%, higher than the current average copper grade of 0.38% at Yunnan Copper Science & Technology Development Co., Ltd. In 2024, it successfully bid for and obtained the exploration rights to the Hailin Copper Mine in Huili City, Sichuan Province, with a mining area of 48.34 square kilometers, further enhancing the resource reserve potential of Liangshan Mining. In addition, the copper mining costs of the mines owned by Liangshan Mining are relatively low, demonstrating good cost competitiveness. The sulphuric acid sales prices in south-west China, where Liangshan Mining is located, are also relatively favorable. This time, the company intends to acquire a 40% stake in Liangshan Mining held by its controlling shareholder, Yunnan Copper Group, which can further resolve horizontal competition and ensure the faithful implementation of relevant commitments. Meanwhile, Liangshan Mining boasts significant resource advantages and a solid profitability foundation, with a return on net assets higher than the industry average. Upon completion of the Hongnipo Copper Mine, it will reach a medium-to-large scale among copper mines, further enhancing its profitability. After the injection of Liangshan Mining into Yunnan Copper, it can effectively increase the publicly listed firm's equity copper resource reserves, enhance the overall asset and profit scale as well as the industry position of the publicly listed firm, facilitate the full play of business synergies by the publicly listed firm, strengthen the reserve of high-quality resources and capacity layout, enhance comprehensive strength and core competitiveness, and promote the high-quality development of the publicly listed firm. In addition, this acquisition is a specific measure taken by the company to implement the relevant opinions of the SASAC of the State Council on improving and strengthening the market value management of listed firms controlled by central state-owned enterprises, and to carry out M&A and restructuring activities that are conducive to enhancing the investment value of listed firms, which is conducive to safeguarding the rights and interests of the listed firm and all its shareholders. 6. What is the construction status of the Hongnipo Project of Liangshan Mining? Yunnan Copper stated: The Hongnipo Copper Mine is currently in the construction phase. The total identified ore reserves amount to 41.606 million mt, with an average copper grade of 1.42% and a copper metal content of 592,900 mt. The company will closely monitor the project's construction progress and strictly fulfill its information disclosure obligations in accordance with relevant regulations such as the "SZSE Listing Rules". Please stay tuned for the company's announcements. According to the record of Yunnan Copper's investor relations activities on March 26, 2025 (Interpretation Meeting Series I for the 2024 Annual Report) previously announced by Yunnan Copper: In 2024, Yunnan Copper adhered to the guidance of Party building, continued to strive and forge ahead, comprehensively implemented the decisions and deployments of the company's Party committee and board of directors, overcame unfavourable factors such as a significant decline in TC and the shutdown of the old facilities of Xinan Copper, and maintained a stable operating situation. The company produced 1.206 million mt of copper cathode, 12.71 mt of gold, 348.99 mt of silver, and 4.8286 million mt of sulphuric acid throughout the year. As of year-end 2024, its total assets amounted to 43.557 billion yuan, with an asset-liability ratio of 57.66%. It achieved operating revenue of 178.012 billion yuan, total profit of 2.316 billion yuan, net profit attributable to the publicly listed firm of 1.265 billion yuan, and basic earnings per share of 0.6312 yuan. The company intends to distribute a cash dividend of 2.4 yuan (tax included) for every 10 shares to all shareholders, without converting capital reserves into share capital. What is the construction progress of the relocation project of the Xinan Copper Branch previously announced by the company? Yunnan Copper previously responded during an institutional survey: The electrolysis system of the upgrade and renovation project for the relocation of Xinan Copper was commissioned with load at the end of June 2024, and the pyrometallurgy system entered the load commissioning phase in mid-October 2024, successfully producing copper anodes. As of now, the overall project for the relocation and upgrade of Xinan Copper has been fully completed and is currently in the load commissioning phase. This project is conducive to optimizing the company's smelting layout and production processes, achieving efficient comprehensive utilisation of resources, reducing production costs, and enhancing the company's overall competitiveness, aligning with the company's development needs for green, low-carbon, large-scale, short-process, low-cost, and digital intelligence. When asked about the company's progress in resource acquisition in 2024, Yunnan Copper previously responded during an institutional survey: The company attaches great importance to the replacement of mine resources, increasing capital investment to carry out comprehensive geological studies of various mining areas and exploration work in the deep and peripheral parts of mines. In 2024, the company invested 65 million yuan in exploration, conducting multiple mineral exploration activities and exploration work in the deep and peripheral parts of mines, adding 91,800 mt of inferred and above copper metal resources, achieving the annual target, and achieving annual reserve increases greater than mine production and consumption for four consecutive years. As of the end of 2024, the company held 964 million mt of copper ore resources, with a copper metal content of 3.6509 million mt and an average copper grade of 0.38%. Among them, Diqing Nonferrous held 846 million mt of copper ore resources, with a copper metal content of 2.8037 million mt and an average copper grade of 0.33%. When analyzing the company's core competitiveness, Yunnan Copper mentioned that its good resource reserves are one of its core competitiveness factors: The company attaches great importance to the replacement of mine resources, increasing capital investment to carry out comprehensive geological studies of various mining areas and exploration work in the deep and peripheral parts of mines. The company's main mines, including the Pulang Copper Mine, Dahongshan Copper Mine, and Yangla Copper Mine, are mainly distributed in the Sanjiang Metallogenic Belt, with favourable metallogenic geological conditions and potential for further prospecting. In 2024, the company invested 65 million yuan in exploration, conducting multiple mineral exploration activities and exploration work in the deep and peripheral parts of mines, adding 91,800 mt of inferred and above copper metal resources, achieving the annual target, and achieving annual reserve increases greater than mine production and consumption for four consecutive years. As of the end of 2024, the company held 964 million mt of copper ore resources, with a copper metal content of 3.6509 million mt and an average copper grade of 0.38%. Among them, Diqing Nonferrous held 846 million mt of copper ore resources, with a copper metal content of 2.8037 million mt and an average copper grade of 0.33%. The 2025 financial budget plan disclosed by Yunnan Copper in its 2024 annual report indicates the following production plans for the company's main products in 2025: The company expects to produce 54,600 mt of copper in copper concentrates, 1.52 million mt of copper cathode, 16 mt of gold, 680 mt of silver, and 5.364 million mt of sulphuric acid throughout the year. The investment plan for 2025 is 1.617 billion yuan, covering fixed asset investments, digital projects, and geological exploration projects. During a survey, Yunnan Copper stated that in Q1 this year, the average price of sulphuric acid in major regions increased significantly YoY. The company actively seized market opportunities, contributing positively to its performance. 》Click to view SMM spot copper prices 》Subscribe to view historical SMM spot metal price trends Reviewing the sulphuric acid price trend in Q1, it can be seen that: In Q1, both domestic and overseas demand was strong, leading to an increase in the price of smelting acid. As of March 28 (week), the average weekly price of smelting acid (sulphuric acid) in Yunnan was 780 yuan/mt, up 280 yuan/mt from the average weekly price of 500 yuan/mt on December 27, 2024 (week). From the perspective of the average price increase, the Q1 increase was 56%. According to SMM, domestically, in Q1, sulphuric acid prices were supported by "spring ploughing" and the cost of raw materials. Overseas, demand was relatively strong in Q1, with export prices also rising to a relatively high level in recent years. After reaching a high average annual price of 780 yuan/mt, with the end of spring ploughing, the operating rates of downstream fertilizer enterprises declined, and domestic demand weakened. Domestic sulphuric acid prices began to weaken from mid-to-late April. In early May, influenced by the end of the spring ploughing season, sulphuric acid prices in many parts of the country were still in the process of pulling back, with significant declines particularly in the south China market, while prices in the northern market remained relatively stable overall. In mid-May, domestic sulphuric acid prices showed mixed performance, mainly due to the continuous release of fertilizer export information and the gradual implementation of related policies, leading to a gradual rebound in downstream demand. Sulphuric acid prices in the south stopped falling and stabilized. After entering late May, sulphuric acid prices in many parts of the country rose again. Since June, sulphuric acid prices in Yunnan have remained stable at the beginning of the month. However, recently, influenced by the escalating geopolitical conflicts and the resulting uncertainties, domestic sulphur and sulphuric acid prices have both risen significantly in the past week, with sulphuric acid prices showing a 15.38% increase in the week ending June 13, with its average price (as of the week ending June 13) rising to 600 yuan/mt.

SMM June 16 News - According to an official announcement from Yunnan Copper Technology Development Co., Ltd., the company is currently conducting a public sale of approximately 30 metric tons (metal content) of selenium ingots. Product Specifications: Purity: Se ≥ 99% (Final purity subject to Yunnan Copper Technology's factory inspection results; the company only guarantees the minimum content of the primary element, selenium) Packaging: Drums on pallets 48 drums per pallet Approx. 1.68 metric tons of selenium per pallet (Final weight subject to actual shipping documents)

SMM June 16 News: According to an official announcement from Yunnan Copper Science & Technology Development Co., Ltd., the company recently offered approximately 30 mt (metal content) of selenium ingots for public sale. Metal grade: selenium ≥99% (subject to the factory test results of Yunnan Copper Science & Technology, which only guarantees the main element, selenium). Product packaging: Barreled and palletized, with 48 barrels per pallet, and each pallet weighing approximately 1.68 mt of selenium (subject to the actual packing list). The bidding sales announcement (Inquiry No.: 202506XSS020010) was released by the Marketing Center of Yunnan Copper Science & Technology Development Co., Ltd. on the Sunshine Procurement Platform of China Copper Corporation Limited before 11:00 on June 16, 2025. Deadline for quotation submission: Bidders must log in to the Sunshine Procurement Platform of China Copper Corporation Limited (https://cg.chncopper.com/epsw/portal/index) and click on "Sunshine Purchase and Sales" to complete the relevant quotation submission before 11:00 on June 19, 2025. Late quotations will not be accepted. The successful bidder is required to pay the full contract amount in full before June 25, 2025.