Offshore trade operations. General projects: technical services, technical development, technical consulting, technical exchange, technology transfer, and technology promotion; manufacturing of specialized water resource machinery and equipment; manufacturing of special equipment (excluding licensed professional equipment manufacturing); manufacturing of general equipment (excluding special equipment manufacturing); manufacturing of environmental protection special equipment; sales of environmental protection special equipment; water environment pollution prevention services; manufacturing of automotive parts and accessories; retail of automotive parts; manufacturing of railway locomotive and rolling stock parts; sales of railway locomotive and rolling stock parts; manufacturing of high-speed rail equipment and parts; sales of high-speed rail equipment and parts; manufacturing of marine supporting equipment; manufacturing of electrical signal equipment devices; sales of electrical signal equipment devices; manufacturing of instruments and meters; sales of instruments and meters; manufacturing of electronic measuring instruments; sales of electronic measuring instruments; manufacturing of drawing, calculating, and measuring instruments; sales of drawing, calculating, and measuring instruments; sales of intelligent instruments and meters; manufacturing of intelligent instruments and meters; manufacturing of molds; sales of molds; manufacturing of metal structures; sales of metal structures; sales of forgings and powder metallurgy products; manufacturing of seals; sales of seals; sales of high-performance sealing materials; sales of mechanical equipment; research and development of mechanical equipment; repair of general equipment; repair of special equipment; maintenance of electronic and mechanical equipment (excluding special equipment); procurement agency services; import and export of goods; sales of food (pre-packaged food only); manufacturing of industrial control computers and systems; sales of industrial control computers and systems; wholesale of computer software, hardware, and auxiliary equipment; retail of computer software, hardware, and auxiliary equipment; software development; software sales.