Urban rail transit equipment manufacturing; Railway rolling stock parts manufacturing; Railway rolling stock parts sales; High-speed rail equipment and accessories manufacturing; Industrial automatic control system device manufacturing; Industrial automatic control system device sales; Motor and its control system research and development; Power electronic components manufacturing; Power electronic components sales; Electronic components and electromechanical component equipment manufacturing; Rail transit specialized equipment, key systems and parts sales; Rail transit engineering machinery and parts sales; Mechanical and electrical equipment manufacturing; Mechanical and electrical equipment sales; Electrical equipment sales; Power distribution switchgear equipment manufacturing; Computer software, hardware and peripheral equipment manufacturing; Lighting fixture manufacturing; Lighting fixture sales; Transformer, rectifier and inductor manufacturing; Semiconductor lighting device manufacturing; Software sales; Information system integration services; Network technology services; Artificial intelligence hardware sales; Artificial intelligence application software development; Industrial control computers and systems manufacturing; Industrial control computers and systems sales; Special equipment repair; Electrical equipment repair; Intelligent control system integration; Technical services, technology development, technical consultation, technical exchange, technology transfer, technology promotion; Information technology consulting services; Labor services (excluding labor dispatch); Human resources services (excluding occupational intermediary and labor dispatch); Technology import and export; Goods import and export; Leasing services (excluding licensed leasing services); Property management.