Metal processing machinery manufacturing; Mechanical parts and parts processing; Mold manufacturing; General parts manufacturing; Motorcycle parts manufacturing; Auto parts and accessories manufacturing; Battery spare parts production; Metal tool manufacturing; Metal structure manufacturing; Hardware product manufacturing; Metal daily necessities manufacturing; Metal cutting machine tool manufacturing Manufacturing; manufacturing of machine tool functional components and accessories; manufacturing of testing machines; manufacturing of general equipment (excluding manufacturing of special equipment); manufacturing of casting machinery; manufacturing of electronic components and electromechanical component equipment; manufacturing of mechanical and electrical equipment; metal cutting processing services; manufacturing of special equipment (excluding manufacturing of licensed professional equipment); elastic manufacturing Spring manufacturing; Bearing steel product production; Fastener manufacturing; Automobile wheel hub manufacturing; Bearing manufacturing; Mechanical parts and component sales; Mold sales; Motorcycle and spare parts retail; Automobile spare parts retail; Spring sales; Metal chains and other metal products sales; Internet sales (except those that require a sales license Commodities); sales of metal tools; sales of molding materials for casting; sales of non-ferrous metal alloys; sales of pneumatic power machinery and components; sales of non-metallic minerals and products; sales of metal materials; sales of mechanical and electrical equipment; sales of mechanical equipment; sales of metal cutting and welding equipment; technology import and export; import and export of goods. .