Kaiser Biotech: Chairman and President Liu Xiucai resigns

Kaisai Biology Announcement: The Board of Directors received a written report from Chairman and President Liu Xiucai stating that, due to the strategic development needs of the company, he resigned from the position of President on November 20, 2025. After resigning, Liu Xiucai will continue to serve as Chairman of the Board, Convener of the Board Strategic Committee, member of the Board Nomination Committee, and Chief Scientist. The fourth meeting of the third session of the Board of Directors has appointed Yang Chen as the new President, with a term matching that of the third session of the Board of Directors. At the same time, the Board of Directors elected Zang Huiqing as Vice Chairman, with a term ending at the end of this session of the Board of Directors.