The board of directors of China Aluminum International Engineering Corporation Limited hereby announced that Mr. Zhang Jian has resigned as the company secretary and authorised representative of the Company due to job change, with effect from 27 April 2023. After his resignation, Mr. Zhang no longer holds any positions in the Company and its subsidiaries. Mr. Zhang has confirmed that he has no disagreement with the Board nor is there any other matter in connection with his resignation which needs to be brought to the attention of The Stock Exchange of Hong Kong Limited and the shareholders of the Company.

Mr. Zhang has demonstrated dedication and diligence in serving the Company during his tenure of office. The Board would like to take this opportunity to extend its sincere gratitude to Mr. Zhang for his contribution to the Company. The Board announces that Ms. Zhao Hongmei has been appointed as a joint company secretary of the Company and the authorised representative of the Company under Rule 3.05 of the Rules Governing the Listing of Securities on The Stock Exchange of Hong Kong Limited (the "Listing Rules"), with effect from 27 April 2023.

Zhao Hongmei: aged 52, is a senior accountant and Ph.D. graduate in economics. She was appointed as the chief financial officer and secretary to the Board on 3 April 2023. She served as, amongst others, the chief member of the finance department of Zhongzhou Aluminum Plant, the chief and deputy manager of the investment accounting section of the finance department of Zhongzhou Branch of Chalco, the chief accountant of Coking Coal Zhaogu Energy Company, the deputy manager and manager of the accounting division of the finance department of Chalco, the deputy general manager of the finance department (the office of the board of directors) of Chalco, the deputy general manager of the operation optimization department and the manager of the budget analysis section (the reform office) of Chinalco, the chairman of the supervisory committee of China Aluminum Logistics Group Corporation Co., Ltd, the chairman of the supervisory committee of Chalco Shanxi New Material Co.

Ltd., the chairman of the supervisory committee of Shanxi Huaxing Aluminum Co. Ltd., a supervisor of Shanxi Huasheng Aluminum Co., Ltd, a director and supervisor of Chinalco Shanghai Company Limited, a supervisor of Chalco International Trading Group Co. Ltd., a supervisor of Chalco Investment and Development Co.

Ltd., a director of Guizhou Huajin Aluminum Co. Ltd., a director of Chinalco Guinea Co. Ltd., a director of Chinalco Environmental Protection and Energy Conservation Co.

Ltd. and a director of China Copper Co. Ltd. The Board further announced that the Company has appointed Ms. Ng Ka Man as a joint company secretary. During the Waiver Period, Ms. Zhao will perform her duties together with Ms. Ng, both as the joint company secretaries.

Ms. Ng is a senior manager of the listing services department of TMF Hong Kong Limited, responsible for providing company secretarial and compliance services to listed company clients. She has over 15 years of experience in the company secretarial industry. Ms. Ng obtained her master degree in Corporate Governance from The Open University of Hong Kong (currently known as the Hong Kong Metropolitan University) in 2011.

She is a member of The Hong Kong Chartered Governance Institute (formerly known as The Hong Kong Institute of Chartered Secretaries) and The Chartered Governance Institute (formerly known as The Institute of Chartered Secretaries and Administrators) in the United Kingdom.