Casting of ferrous metals; manufacturing of molds; sales of molds; processing of mechanical parts and components; sales of mechanical parts and components; manufacturing of auto parts and accessories; manufacturing of general parts; manufacturing of high-speed rail equipment and accessories; manufacturing of railway locomotive and rolling stock parts; manufacturing of mining machinery; manufacturing of marine supporting equipment; manufacturing of general valves and cocks (excluding special equipment); manufacturing of gears, gear reducers, and gearboxes; manufacturing of agricultural, forestry, animal husbandry, and fishery machinery parts; manufacturing of general equipment (excluding special equipment); import and export of goods; import and export of technology; import and export agency; leasing of land use rights; leasing of mechanical equipment; information consulting services (excluding licensed information consulting services); technical services, technical development, technical consulting, technical exchange, technology transfer, and technology promotion; information technology consulting services.