Design, production, sales, maintenance, and technical consulting of automation equipment; sales of computer software, hardware, and consumables, mechanical equipment and parts, hydraulic and pneumatic components, instruments and meters, metal materials, non-metal materials, chemical products, daily necessities, hardware and electromechanical products, household appliances, stationery, clothing, and communication equipment; self-operated and agent import and export business of various goods and technologies (excluding goods and technologies restricted or prohibited by the state). General items: Manufacturing of urban rail transit equipment; software development; software sales; sales of railway transportation equipment; sales of rail transit specialized equipment, key systems, and components; repair of specialized equipment; manufacturing of railway locomotive and rolling stock parts; sales of railway locomotive and rolling stock parts.