天坛生物：杨汇川辞去董事长等职务

Group 1 - The company TianTan Biological announced the resignation of its chairman Yang Huichuan due to work adjustments, while he will continue to serve as a board member and general manager [1] - Yang Huichuan has stepped down from multiple positions including chairman, head of the strategic and investment committee, and member of the performance assessment and compensation committee [1] - The resignation is effective immediately upon delivery to the company's board of directors [1] Group 2 - The Ministry of Finance has imposed maximum penalties on a company for concealing key audit work papers and refusing to cooperate with investigations regarding financial misconduct [1]