RECBIO-B(02179): Electing Xu Haoyu as Chairman.

RECBIO-B (02179) Announcement: The Board of Directors received Dr. Liu Yong's resignation report on December 22, 2025. In order to further enhance the company's governance level and dedicate more time to other work plans, Dr. Liu Yong resigned from the positions of Chairman of the Board and Chairman of the Nomination Committee, effective from the date a new Chairman is elected by the Board. Dr. Liu Yong will continue to serve as an executive director and general manager of the company, overseeing all aspects of the company's production and operations management. The Board of Directors is pleased to announce that Mr. Xu Haoyu was elected as the Chairman of the second Board of Directors at the Board meeting held on December 23, 2025, with a term lasting from the date of the Board's approval until the end of the second Board's term. As Dr. Liu Yong has tendered his resignation report, in accordance with the Listing Rules, the Company Law of the People's Republic of China, the Corporate Governance Guidelines for Listed Companies, the Company's Articles of Association, and the Rules of the Nomination Committee of the Board of Directors, in order to ensure the normal and continuous operation of the Nomination Committee, the Board of Directors elected Prof. Gao Feng as the Chairman of the second Nomination Committee and Ms. Wang Jing as a member of the second Nomination Committee at the Board meeting held on December 23, 2025. The terms of Prof. Gao Feng and Ms. Wang Jing will last from the date of the Board's approval until the end of the second Board's term.