Processing and manufacturing of machine tool functional parts and accessories, mechanical parts, electronic components and electromechanical component equipment, electronic components, industrial automation control system devices, metal accessories, mechanical equipment and accessories, machine tool accessories, metal products, rubber products, stainless steel products, environmental protection equipment, electromechanical equipment, auto parts, motorcycle parts, Wujinjiaodian (manufacturing and processing are operated by separate branches) and sales. The sale of building materials and other projects that are not prohibited or do not require business licenses according to laws, regulations, decisions of the State Council, etc. and projects that are not included in the negative list for local industrial development.