Manufacturing of sanitary ware; sales of sanitary ware; research and development of sanitary ware; manufacturing of hardware products; retail of hardware products; research and development of hardware products; wholesale of kitchenware, sanitary ware and daily necessities; sales of electronic products; wholesale of computer software, hardware and auxiliary equipment; retail of computer software, hardware and auxiliary equipment; production of furniture spare parts; sales of furniture spare parts; repair of metal products; metal products Sales; research and development of metal products; manufacturing of metal chains and other metal products; sales of metal chains and other metal products; manufacturing of metal products for safety and fire protection; computer and office equipment maintenance; manufacturing of daily necessities made of metal; wholesale of daily necessities; sales of daily necessities; manufacturing of non-ferrous metal alloys; sales of non-ferrous metal alloys; building decoration, plumbing pipe parts and other construction Manufacturing of metal products; sales of building decoration materials; manufacturing of sanitary ceramic products; sales of sanitary ceramic products; manufacturing of distribution switch control equipment; sales of distribution switch control equipment; retail of automobile parts and accessories; manufacturing of automobile parts and accessories; manufacturing of motorcycle parts and accessories; retail of motorcycles and spare parts; manufacturing of liquid and airtight components and systems; sales of liquid and airtight components and systems; Sales of fire-fighting equipment; manufacturing of plastic products; sales of plastic products; manufacturing of special equipment for plastic processing; sales of special equipment for plastic processing; Internet sales (except for the sale of goods requiring licenses); manufacturing of rubber products; sales of rubber products; technical services, technology development, technical consultation, technology exchange, technology transfer, technology promotion; import and export of goods; import and export of technology.