Wholesale and import of plastic pipes, plastic products and accessories, hardware products and accessories, metal products and accessories, metal pipes (excluding steel products), chemical raw materials and products (excluding hazardous chemicals), metal valves, mechanical equipment and accessories Export business (not involving state trade management commodities, involving quota, license management commodities, the application shall be handled in accordance with relevant state regulations), machinery and equipment leasing. (The above items do not involve special management measures for foreign investment access). (Projects subject to approval according to law can only be operated after approval by relevant departments)