Manufacturing of industrial automatic control system devices; sale of industrial automatic control system devices; manufacturing of instruments and meters; repair of instruments and meters; sale of instruments and meters; manufacturing of intelligent instruments and meters; sale of intelligent instruments and meters; manufacturing of other general instruments; manufacturing of high-speed rail equipment and accessories; manufacturing of railway locomotive and rolling stock parts; sale of specialized equipment, key systems, and components for rail transit; sale of mechanical equipment; sale of mechanical and electrical equipment; wholesale of hardware products; wholesale of computer software and hardware and auxiliary equipment; sale of chemical products (excluding licensed chemical products); technical services, technology development, technical consultation, technical exchange, technology transfer, and technology promotion; software development; technology import and export; goods import and export; import and export agency. None.