Railway locomotive and rolling stock design; railway locomotive and rolling stock manufacturing; railway locomotive and rolling stock repair; railway transportation infrastructure equipment manufacturing; special equipment design; special equipment manufacturing; special equipment installation, modification, and repair; construction engineering construction; road cargo transportation (excluding dangerous goods). General items: new energy prime mover equipment manufacturing; new energy vehicle complete vehicle sales; new energy vehicle battery swap facility sales; new energy vehicle waste power battery recycling and cascade utilization (excluding hazardous waste operations); battery sales; battery parts sales; engineering and technological research and development; emerging energy technology research and development; energy storage technical services; mining machinery manufacturing; mining machinery sales; mining industry high-efficiency energy-saving technology research and development; railway locomotive and rolling stock sales; railway transportation equipment sales; railway transportation infrastructure equipment sales; railway locomotive and rolling stock parts sales; railway locomotive and rolling stock parts manufacturing; narrow-gauge locomotive and rolling stock manufacturing; metallurgical special equipment manufacturing; metallurgical special equipment sales; special equipment repair; ship design; ship manufacturing; special equipment sales; motor manufacturing; motor and its control system research and development; generator and generator set manufacturing; generator and generator set sales; power distribution switchgear equipment research and development; power distribution switchgear equipment manufacturing; power distribution switchgear equipment sales; electrical machinery special equipment manufacturing; special equipment manufacturing (excluding licensed professional equipment manufacturing); metal structure manufacturing; gears and gear reduction and transmission manufacturing; bearings, gears, and transmission components manufacturing; transportation equipment leasing services; charging pile sales; power transmission and distribution and control equipment manufacturing; motor vehicle charging sales; import and export of goods.