General items: Technical services, technological development, technical consultation, technical exchanges, technology transfer, technology promotion; Sales of metal products; Sales of metal materials; Sales of metal structures; Sales of non-ferrous metal alloys; Sales of metal fittings for construction; Sales of metal forming machines; Sales of metal tools; Research and development of metal products; Sales of rubber products; Sales of machinery and equipment; Sales of chemical products (excluding licensed chemical products); Sales of forgings and powder metallurgy products; Sales of building materials; Sales of mechanical parts and components; Sales of office supplies; Sales of power electronic components; Operation of wires and cables; Wholesale of hardware products; Import and export of goods; Import and export of technology; Import and export agency (except for items that require approval according to law, business activities shall be carried out independently according to law with a business license)