Railway locomotive and rolling stock design; railway locomotive and rolling stock repair; inspection and testing services; special equipment manufacturing; installation, repair, and testing of power transmission, supply, and reception facilities. General items: railway locomotive and rolling stock parts manufacturing; railway locomotive and rolling stock parts sales; high-speed rail equipment and parts manufacturing; high-speed rail equipment and parts sales; urban rail transit equipment manufacturing; rail transit special equipment, key systems and components sales; rail transit engineering machinery and parts sales; narrow-gauge locomotive and rolling stock manufacturing; other electronic device manufacturing; mechanical and electrical equipment manufacturing; mechanical and electrical equipment sales; metrology technical services; metal structure manufacturing; metal cutting processing services; mechanical parts and components processing; technical services, technical development, technical consulting, technical exchange, technology transfer, and technology promotion; railway transport auxiliary activities; special equipment manufacturing (excluding licensed professional equipment manufacturing); metal surface treatment and heat treatment processing; quenching processing; spray coating processing; non-road leisure vehicle and parts manufacturing; non-road leisure vehicle and parts sales; mold manufacturing; mold sales; metal material sales; import and export of goods; import and export agency; mechanical equipment leasing; leasing services (excluding licensed leasing services); transport equipment leasing services; non-residential real estate leasing; automotive parts and accessories retail; energy storage technical services; battery manufacturing; generator and generator set manufacturing; labor services (excluding labor dispatch); general mechanical equipment installation services; loading and unloading; industrial automatic control system device manufacturing; material handling equipment manufacturing; general equipment manufacturing (excluding special equipment manufacturing); special equipment repair; general equipment repair; industrial robot installation and repair; electrical equipment repair; mechanical equipment sales; intelligent basic manufacturing equipment manufacturing; industrial design services; mechanical equipment research and development; foreign contracted projects; software development; domestic trade agency; charging pile sales; centralized fast charging stations; power electronic components manufacturing; emerging energy technology research and development; high-efficiency energy-saving technology research and development in the power industry; power distribution switchgear equipment research and development; battery leasing; intelligent power transmission and distribution and control equipment sales; power transmission and distribution and control equipment manufacturing; battery sales; generator and generator set sales; electrical equipment sales; power distribution switchgear equipment sales; power distribution switchgear equipment manufacturing; electric vehicle charging infrastructure operation.