Mechanical equipment and accessories, metal products, plastic product processing (limited to branch operations), wholesale, retail, installation and maintenance of mechanical equipment (except special equipment), water and electricity installation, safety engineering, chemical raw materials and products (except hazardous chemicals, monitoring chemicals, civil explosives, precursor chemicals), environmental protection equipment, electromechanical equipment, Wujinjiaodian, electronic products, electrical equipment and accessories, building materials, valves, pipe fittings, craft gifts, toys, power tools, clothing and apparel, auto parts, motorcycle parts wholesale and retail. [Projects that require approval according to law can only be carried out with approval from relevant departments]