General items of import and export of goods: metal tool manufacturing; metal tool sales; CNC machine tool manufacturing; CNC machine tool sales; metal cutting machine tool manufacturing; metal cutting machine tool sales; metal cutting processing services; general equipment manufacturing (excluding special equipment manufacturing); bearings, gears and transmission parts manufacturing; bearings, gears and transmission parts sales; mechanical equipment research and development; mechanical equipment Sales; manufacturing of gears and gear reducers and gearboxes; sales of gears and gear reducers and gearboxes; manufacturing of automobile parts and accessories; manufacturing of motorcycle parts and accessories; research and development of motorcycle parts; retail of motorcycles and spare parts; processing of mechanical parts and parts; sales of mechanical parts and parts; technical services, technology development, technical consultation, technology exchange, technology transfer, and technology promotion