Technical services, technology development, technical consultation, technology exchange, technology transfer, technology promotion; special equipment manufacturing (excluding licensed professional equipment manufacturing); general equipment manufacturing (excluding special equipment manufacturing); environmental consulting services; sales of special equipment for environmental protection; sales of mechanical equipment; sales of mechanical parts and components; wholesale of hardware products; sales of metal products Sales of bearings; sales of high-performance non-ferrous metals and alloy materials; sales of building materials; wholesale of automobile parts; wholesale of motorcycles and spare parts; sales of mopeds, scooters and spare parts; sales of office supplies; sales of pipeline transportation equipment; sales of wood; sales of gas, liquid separation and purification equipment; sales of chemical products (excluding licensed chemical products); resistant Sales of fire materials; wholesale of electronic components; sales of electronic products; wholesale of stationery; sales of automobile decorative supplies; wholesale of clothing and apparel; sales of knitted textiles and raw materials; sales of furniture; wholesale of computer software, hardware and auxiliary equipment; sales of rubber products; business of wires and cables; sales of arts and crafts and ceremonial items (except ivory and its products); sales of fire-fighting equipment sales; sales of communication equipment; sales of lighting appliances; sales of daily necessities; sales of packaging materials and products; general machinery and equipment installation services; installation and maintenance of professional machinery for agriculture, forestry, animal husbandry, sideline fisheries; general equipment repair; electrical equipment repair; special equipment repair; recycling of renewable resources (except productive scrap metal); processing of renewable resources; import and export of goods; import and export of technology