General project technical services, technical development, technical consultation, technical exchange, technology transfer, technology promotion; sales of chemical products (excluding licensed chemical products); lubricant sales; sales of specialized chemical products (excluding hazardous chemicals); sales of petroleum products (excluding hazardous chemicals); sales of solar thermal utilization equipment; retail of hardware products; sales of biomass solid fuel; manufacturing of building decoration, plumbing pipe fittings, and other architectural metal products; sales of furnaces, melting furnaces, and electric furnaces; sales of pumps and vacuum equipment; sales of building materials; sales of refrigeration and air conditioning equipment; sales of rubber products; residential electrical and water installation and maintenance services; sales of machinery and equipment; sales of electrical equipment; sales of special equipment. Permitted projects: operation of hazardous chemicals; operation of hazardous waste; construction engineering.