The design, manufacture and processing of machinery and equipment (except special equipment), packaging equipment, conveying equipment, environmental protection equipment and complete sets of electrical equipment (operating with the upper limit of branches), installation, wholesale and retail, processing of molds, metal punching parts, stainless steel products, cold work sheet metal and aluminum alloy products (limited to branch operations), wholesale and retail, engaged in technology development, technical consultation, technical services, technology transfer, architectural decoration and construction engineering design and construction in the field of mechanical and electrical science and technology.