Manufacturing of hardware products; wholesale of hardware products; research and development of hardware products; retail of hardware products; sales of mechanical parts and components; sales of molds; sales of metal products; manufacturing of hydraulic power machinery and components; sales of hydraulic power machinery and components; manufacturing of motorcycle parts; sales of metal forming machine tools; research and development of new material technology; manufacturing of special machinery for the production of building materials; sales of bearings, gears and transmission components; manufacturing of pumps and vacuum equipment; manufacturing of bearings, gears and transmission components; Sales of gears and gear reducers and gearboxes; research and development of mechanical equipment; sales of industrial automatic control system devices; manufacturing of gears and gear reducers and gearboxes; sales of liquid and gas-tight components and systems; manufacturing of metal forming machine tools; retail of clothing and apparel; sales of clothing accessories; wholesale of clothing and apparel; sales of daily necessities; Internet sales (except for the sale of goods requiring licenses); sales of plastic products; manufacturing of metal daily necessities; sewing machinery manufacturing; plastic product manufacturing; and sales of sewing machinery. Licensed items: import and export of goods; import and export of technology; import and export agency.