Technical services, technology development, technical consulting, technology exchange, technology transfer, and technology promotion; software development; development of rail transit operation management systems; development of rail transit communication and signal systems; research and development of mechanical equipment; manufacture of mechanical and electrical equipment; manufacture of railway locomotive and rolling stock parts; manufacture of high-speed rail equipment and accessories; manufacture of transformers, rectifiers, and inductors; manufacture of instruments and meters; manufacture of power electronic components; sales of rail transit specialized equipment, key systems, and components; sales of railway locomotive and rolling stock parts; sales of railway transport equipment; sales of electronic products; sales of instruments and meters; information system integration services; leasing services for transport equipment; labor services (excluding labor dispatch); industrial engineering design services; installation services for general mechanical equipment; repair of electrical equipment; technology import and export; import and export of goods. (Shall not engage in activities prohibited or restricted by national and municipal industrial policies.)