Design and manufacturing of rail transit equipment; production, maintenance, design, assembly, and after-sales service of rail vehicle parts; manufacturing and sales of electromechanical products, electronic products, computer-related equipment, numerical control equipment, rubber and plastic parts. Licensed projects: Maintenance of railway locomotives and rolling stock. General projects: Property management; housekeeping services; professional cleaning, washing, and disinfection services; landscaping construction; catering management; labor services (excluding labor dispatch); technical services, technical development, technical consulting, technical exchange, technical transfer, and technical promotion; installation services for general mechanical equipment.