Research and development of new material technology; manufacturing of new membrane materials; manufacturing of plastic products; manufacturing of household products; manufacturing of household textile products; manufacturing of hardware products; sales of household products; sales of needle textiles and raw materials; wholesale of hardware products; sales of sponge products; sales of new membrane materials; manufacturing of arts and crafts and ceremonial items (except ivory and its products); sales of machinery and equipment; sales of mechanical and electrical equipment; sales of rubber products; sales of daily necessities; Wholesale of cosmetics; retail of cosmetics; sales of hairdressing accessories; wholesale of jewelry; retail of jewelry; sales of household appliances; sales of packaging materials and products; wholesale of automobile parts and accessories; sales of new automobiles; retail of automobile parts; wholesale of motorcycles and spare parts; retail of motorcycles and spare parts; wholesale of clothing and apparel; retail of clothing and apparel; wholesale of textiles, clothing and household products; wholesale of shoes and hats; retail of shoes and hats; sales of feathers (velvet) and products sales; sales of building decoration materials; wholesale of computer software, hardware and auxiliary equipment; retail of computer software, hardware and auxiliary equipment; sales of office equipment; sales of office equipment consumables; sales of communication equipment; sales of leather; wholesale of stationery supplies; retail of stationery supplies; sales of lighting equipment; sales of cement products; sales of insulation materials; sales of clocks and watches; sales of glasses (excluding contact lenses); sales of daily glass products; retail of electronic components; individuals Sales of sanitary products; sales of audio equipment; sales of sanitary ware; sales of fire-fighting equipment; sales of cameras and equipment; retail of sporting goods and equipment; sales of special equipment for metallurgy; sales of special equipment for environmental protection; sales of metal materials; sales of chemical products (excluding licensed chemical products); import and export of goods; import and export of technology; import and export agency; manufacturing of general equipment (excluding manufacturing of special equipment); sales of high-performance fibers and composite materials.