上大股份：董事李爱民因内部工作调整辞职

Group 1 - The company announced that board member Li Aimin has resigned due to internal work adjustments, but will continue to serve as Chief Engineer [1] - The company's third employee representative congress elected Zheng Xianfeng as the employee representative director of the second board, with a term until the second board's term ends [1] - Zheng Xianfeng has previously held positions such as process engineer and technical section chief at Fushun Special Steel, and has been the Chief Process Engineer at the company since December 2020 [1]