Wholesale: Printing materials, mechanical equipment and accessories, electromechanical equipment and accessories, instruments and meters, metal products, metal materials, molds, wires and cables, plastic products, rubber products, aluminum plastic products, electronic products, office supplies and equipment, labor protection equipment, security equipment, hydraulic equipment, hardware and electromechanical; Production, processing, installation, and maintenance of mechanical and electromechanical equipment; Printing; Import and export of goods and technology. (Projects that require approval according to law can only be operated with the approval of relevant departments)