宇晶股份：公司不生产电池，以高端数控设备制造、配套核心耗材为主营业务

Group 1 - The company, Yujing Co., does not manufacture batteries but focuses on high-end CNC equipment manufacturing and core consumables [2] - The main business activities include research, production, and sales of equipment and consumables for cutting, grinding, and polishing hard and brittle materials [2]