Manufacturing of casting machinery; sales of casting machinery; processing of mechanical parts and components; sales of mechanical parts and components; manufacturing of automotive parts and accessories; manufacturing of railway locomotive and rolling stock parts; sales of railway transportation infrastructure equipment; sales of rail transit engineering machinery and components; sales of railway locomotive and rolling stock parts; sales of railway locomotives and rolling stock; manufacturing of mining machinery; sales of mining machinery; sales of metal building accessories; manufacturing of metal structures; sales of metal structures; sales of concrete structural components; manufacturing of general parts; leasing of construction machinery and equipment; sales of special equipment for agricultural and sideline food processing; manufacturing of special equipment (excluding licensed professional equipment manufacturing); manufacturing of special equipment for food, beverages, alcohol, and tea production; manufacturing of agricultural machinery; sales of agricultural machinery; sales of agricultural, forestry, animal husbandry, and fishery machinery parts; manufacturing of hardware products; retail of hardware products; manufacturing of molds; sales of molds; manufacturing of power facility equipment; sales of electrical equipment; import and export of goods; import and export of technology.