Hong Kong Exchanges and Clearing Limited and The Stock Exchange of Hong Kong Limited take no responsibility for the contents of this announcement, make no representation as to its accuracy or completeness and expressly disclaim any liability whatsoever for any loss howsoever arising from or in reliance upon the whole or any part of the contents of this announcement. Resignation of chairman of the board and authorization to act as a proxy to exercise the powers of the chairman of the board and the relevant board committees and change of authorized representative The board of directors (the "Board") of China National Building Material Company Limited (the "Company") received the resignation letter of Mr. Zhou Yuxian ( "Mr. Zhou") on 27 August 2026. According to the work arrangement, Mr. Zhou applied to resign from the positions of chairman of the Board, executive director and legal representative of the Company. The resignation of Mr. Zhou is effective from 27 August 2026. As a result, Mr. Zhou also ceased to act as the chairman of the Strategic Decision Committee, the chairman of the Nomination Committee, a member of the Remuneration and Appraisal Committee, the chairman of the Environmental, Social and Governance Committee of the Company and an authorized representative of the Company (the "Authorized Representative") under Rule 3.05 of the Rules Governing the Listing of Securities on The Stock Exchange of Hong Kong Limited with effect from 27 August 2026. Mr. Zhou has confirmed that he has no disagreement with the Board and there is no other matter relating to his resignation that needs to be brought to the attention of the shareholders of the Company. In order to ensure the normal operation of the Board and the Board committees, the Board has considered and approved at a meeting held on 27 August 2026 to authorize Mr. Wei Rushan, the executive director of the Company, to exercise the powers of the chairman of the Board on his behalf and perform the practical work of the legal representative. As well as the resolution on exercising the powers of the chairman of the Strategic Decision Committee, the chairman of the Nomination Committee, the member of the Remuneration and Appraisal Committee and the chairman of the Environmental, Social and Governance Committee and appointing Mr. Wei Rushan as the authorized representative of the Company. The term of office of Mr. Wei Rushan in respect of the above deputy duties and appointments shall commence from 27 August 2026 until the election of the new chairman of the Board. The Company is actively preparing for the election of the new chairman of the Board and will convene a meeting and publish the relevant announcement in due course. Mr. Zhou has served as the chairman of the Board and an executive director of the Company since November 2021. During his tenure of office, he has been diligent and dedicated, and has made outstanding contributions to the high-quality development of the Company. The Board would like to express its sincere gratitude to Mr. Zhou for his contribution during his tenure of office. By order of the Board China National Building Material Company Limited * Miao Xiaoling Executive Director and Secretary to the Board Beijing, the PRC 27 August 2026 As at the date of this announcement, the board of directors of the Company comprises Mr. Wei Rushan, Mr. Wang Bing and Ms. Miao Xiaoling as executive directors, and Mr. Wang Yumeng and Mr. Chen Shaolong as non-executive directors. And the independent non-executive Directors are Mr. Sun Yanjun, Mr. Liu Jianwen, Mr. Zhou Fangsheng, Mr. Li Jun and Ms. Xia Xue. * For identification purposes
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