Processing and sales of wood products and metal products (excluding rare and precious metals); sales: metal materials (excluding rare and precious metals), steel pipes, building materials (excluding hazardous chemicals), mechanical and electrical equipment (excluding automobiles) and accessories, auto parts and motorcycle accessories (excluding engines), Wujinjiaodian and accessories, mineral products (except for special national regulations), chemical products (excluding dangerous goods and precursor drugs). (Business projects that require approval can only be operated after obtaining approval)