Non-ferrous metal rolling processing; non-ferrous metal alloy manufacturing; hardware product manufacturing; hardware product wholesale; hardware product retail; auto parts and accessories manufacturing; auto parts wholesale; auto parts retail; motorcycle parts manufacturing; motorcycles and spare parts wholesale; motorcycles and spare parts retail; off-highway recreational vehicles and spare parts manufacturing; off-highway recreational vehicle and spare parts sales; Wholesale of bicycles and spare parts; retail of bicycles and spare parts; sales of assistive bicycles, scooters and spare parts; manufacturing of agricultural, forestry, animal husbandry and fishery machinery parts; manufacturing of metal parts for construction; manufacturing of machinery for construction projects; manufacturing of plastic products; sales of plastic products; manufacturing of special electronic equipment; manufacturing of electronic components and electromechanical components; manufacturing of intelligent instruments and meters; repair of instruments and meters; Manufacturing of general parts; manufacturing of bearings, gears and transmission parts; sales of bearings, gears and transmission parts; mold manufacturing; sales of molds; production of molding materials for casting; sales of molding materials for casting; manufacturing of casting machinery; processing of mechanical parts and components; sales of mechanical parts and components; manufacturing of metal tools; sales of metal tools; sales of electronic products; sales of communication equipment; Sales of metal chains and other metal products; professional design services; industrial design services; automobile wheel hub manufacturing; rubber product manufacturing; rubber product sales; motor manufacturing; generator and generator set manufacturing; metal material sales; metal cutting processing services; mechanical and electrical equipment manufacturing; mechanical and electrical equipment sales; research and development of motors and their control systems; import and export of goods; import and export of technology.