Announcement on the Implementation of Issuing Shares to Purchase Assets and Raise Supporting Funds and Related Transactions

Special Reminders

1. This issuance refers only to the shares issued for the purpose of raising supporting funds in this transaction.
2. The issuance price of the new shares is 9.07 RMB/share, with a total fundraising amount of 1,499,999,992.18 RMB. After deducting issuance costs (excluding VAT) of 7,075,471.66 RMB, the net fundraising amount is 1,492,924,520.52 RMB.
3. The number of new shares issued is 165,380,374 shares, increasing the total share capital of the listed company to 2,425,184,040 shares.
4. The Shenzhen Branch of China Securities Depository and Clearing Co., Ltd. accepted the application materials for the registration of the new shares on March 3, 2026. Once the shares are registered, they will be officially included in the company's shareholder register.
5. The listing date for the new shares is March 16, 2026. According to the relevant business rules of the Shenzhen Stock Exchange, the company's stock price will not be adjusted on the first day of listing, and there will be limits on stock trading fluctuations.
6. The nature of the newly issued shares is restricted circulation shares, which cannot be transferred within 60 months from the end of the share issuance (except for transfers between different entities under the same actual controller, as permitted by applicable laws and regulations).

Company Declaration

The company and all directors and senior management guarantee the truthfulness, accuracy, and completeness of this announcement and its summary, committing that there are no false records, misleading statements, or significant omissions, and they will bear legal responsibility according to law. After the completion of this transaction, the changes in the company's operations and earnings will be the company's own responsibility; the investment risks arising from this transaction will be borne by investors themselves. Investors with any questions regarding this announcement and its summary should consult their stock brokers, lawyers, accountants, or other professional advisors. The company reminds investors that the purpose of this announcement is solely to provide the public with information regarding the implementation of this transaction. For more information, please carefully read the full text of the "Report on Issuing Shares to Purchase Assets and Raise Supporting Funds and Related Transactions" and other related documents, which have been published on the Giant Tide Information Network (http://www.cninfo.com.cn).

Declaration of All Directors and Senior Management

The company and all directors and senior management guarantee the truthfulness, accuracy, and completeness of this announcement and its summary, with no false records, misleading statements, or significant omissions, and they bear individual and joint legal responsibility.

All directors' signatures: Kong Desong, Sun Chengyu, Jiang Ganchuang, Luo Decai, Chai Zhenglong, Han Jingen, Guo Kaishi, Wang Yong, Yang Yong, Na Pengjie, Han Runsheng

All non-director senior management signatures: Gao Hongbo, Yang Wei, Feng Xinglong, Yuan Mingli

Yunnan Copper Co., Ltd. March 10, 2026

Table of Contents

1. Definitions
2. Basic Information of the Company
3. Issuance of New Shares
4. Listing of New Shares
5. Changes in Shares and Their Impact
6. Continuous Supervision
7. Relevant Institutions for the Issuance and Listing of New Shares
8. Other Important Matters
9. Documents for Inspection