Sales of bearings, gears and transmission parts; Sales of metal products; Second hand sale; Sales of mechanical parts and components; Sales of leather products; Internet sales (except for the sale of goods requiring license); Retail of hardware products; Wholesale of hardware products; Sales of mechanical equipment; Sales of electrical and mechanical equipment; Lamp sales; Battery sales; Used car sales; Auto parts retail; Sales of automotive decorative supplies; New car sales; Manufacturing of auto parts and accessories; Research and development of auto parts; Sales of electric accessories of new energy vehicles; Wholesale of auto parts; Automobile decoration products manufacturing; Automobile hub manufacturing; Sales of gears, gear reducers and gearboxes;