Urban rail transit equipment manufacturing; sales of specialized equipment, key systems and components for rail transit; manufacturing of high-speed rail equipment, accessories and parts; sales of high-speed rail equipment, accessories and parts; manufacturing of railway rolling stock parts; sales of railway rolling stock parts; manufacturing of automotive parts and accessories; retail of automotive parts; sales of air transport equipment; technical services, technology development, technical consultation, technology exchange, technology transfer, and technology promotion; import and export of goods; import and export agency.