Research and development of new material technology; sales of building materials; sales agent; sales of plastic products; manufacturing of plastic products; technical services, technology development, technical consulting, technology exchange, technology transfer, technology promotion; manufacturing of building decoration, plumbing parts and other metal products for construction; sales of building decoration materials; sales of metal accessories for construction; sales of new metal functional materials; research and development of metal products; sales of metal products; sales of architectural ceramic products; sanitary ceramics Sales of porcelain products; research and development of hardware products; manufacturing of hardware products; wholesale of hardware products; retail of hardware products; sales of daily glass products; sales of glass fiber reinforced plastic products; sales of synthetic materials; sales of thermal insulation and sound insulation materials; sales of sealing fillers; sales of coatings (excluding hazardous chemicals); sales of building waterproofing membrane products; research and development of valves and cocks; professional design services; engineering management services; industrial design services; advertising production; advertising release Sales of paper products; sales of packaging materials and products; manufacturing of plastic boxes and containers; packaging services; sales of gas, liquid separation and purification equipment; manufacturing of gas, liquid separation and purification equipment; research and development of household appliances; sales of household appliances; sales of household appliance spare parts; sales of non-electric household appliances; manufacturing of water resources-specific machinery and equipment; rental services (excluding licensed rental services); household appliance installation services; residential water and electricity installation and maintenance services ; Mechanical equipment leasing; general machinery and equipment installation services; general cargo warehousing services (excluding hazardous chemicals and other items requiring license approval); warehousing equipment leasing services; material handling equipment sales; electric bicycle sales; motorcycles and spare parts retail; consulting and planning services; investment activities with own funds; Internet sales (except for the sale of goods that require licenses); maternal and child product sales; and food Internet sales (only prepackaged food is sold). Licensed items: Category II value-added telecommunications services.