Manufacturing of special equipment (excluding manufacturing of licensed professional equipment); sales of mechanical equipment; leasing of mechanical equipment; R&D of mechanical equipment; sales of metal products; R&D of metal products; repair of metal products; sales of electronic products; manufacturing of electronic components; sales of power electronic components; sales of special electronic materials; manufacturing of special electronic materials; technical services, technology development, technical consultation, technology exchange, technology transfer, technology promotion; mechanical parts and components Sales; mechanical parts and parts processing; manufacturing of special textile equipment; manufacturing of fasteners; manufacturing of electrical equipment; manufacturing of automotive decorative products; sales of electronic components and electromechanical component equipment; manufacturing of electronic components and electromechanical component equipment; manufacturing of power electronic components; sales of molds; sales of teaching models and teaching aids; manufacturing of teaching models and teaching aids; mold manufacturing; repair of special equipment; manufacturing of special equipment for pharmaceuticals; manufacturing of special equipment for metallurgy; packaging Sales of special equipment; sales of mobile communication equipment; manufacturing of mobile communication equipment; maintenance of computers and office equipment; manufacturing of general equipment (excluding manufacturing of special equipment); repair of general equipment; repair of communication equipment; sales of communication equipment; leasing of computers and communication equipment; repair of electrical equipment; sales of mechanical and electrical equipment; manufacturing of mechanical and electrical equipment; sales of electrical equipment; general mechanical equipment installation services; maintenance of electronic and mechanical equipment (excluding special equipment Preparation); sales of machinery for construction engineering; manufacturing of machinery for construction engineering; leasing of construction machinery and equipment; import and export of goods; import and export of technology; metal cutting and processing services; metal surface treatment and heat treatment processing; manufacturing of automobile parts and accessories; manufacturing of railway rolling stock accessories; manufacturing of high-speed rail equipment and accessories; manufacturing of metal parts for construction; manufacturing of off-highway recreational vehicles and spare parts; manufacturing of motorcycle parts; and manufacturing of agricultural, forestry, animal husbandry and fishery machinery parts. Licensed projects: aerospace equipment manufacturing; civil aircraft maintenance; design and production of civil aircraft parts.