General business scope: Sales of mechanical equipment; Mechanical equipment leasing; Mechanical equipment research and development; Sales of mechanical parts and components; Manufacturing of instant brush specialized equipment; Ink sales (excluding sales of hazardous chemicals and machinery; sales of electronic components for power electronics; sales of electronic special equipment for ink manufacturing; sales of packaging special equipment and electromechanical components for additive manufacturing equipment; continued sales of plastic processing and other equipment; sales of metal forming machine tools for office equipment; sales of pneumatic and electric tools; and manufacturing of rubber processing special copying and offset printing equipment; Painting equipment sales, metal products sales, electronic and mechanical equipment maintenance (excluding special equipment), plastic product manufacturing; Sales of gears and plastic products;; Sales of metal chains and other metal products; Fabric textile processing, needle textile sales; Embroidery processing (except for projects that require approval according to law, it can independently carry out business activities with its business license in accordance with the law)