Import and export of goods: Technology import and export, sales of wood, sales of artificial boards; Sales of asbestos products: Sales of rubber products, sales of synthetic materials, sales of packaging materials and products: Sales of refractory materials, sales of non-ferrous metal alloys, sales of metal materials; Sales of insulation and sound insulation materials, sales of metal structures, wholesale of kitchenware, sanitary ware, and daily necessities, sales of sanitary ware, sales of sanitary ceramic products, sales of enamel products (except for projects that require approval according to law, independent according to law based on business license)