Manufacturing of railway locomotive and rolling stock parts; sales of railway locomotive and rolling stock parts; technical services, technical development, technical consulting, technical exchange, technology transfer, and technology promotion; manufacturing of rubber products; sales of rubber products; manufacturing of plastic products; sales of plastic products; sales of specialized equipment, key systems, and components for rail transit; manufacturing of high-speed rail equipment and parts; sales of high-speed rail equipment and parts; manufacturing of vibration and noise reduction equipment; sales of vibration and noise reduction equipment; sales of rail transit engineering machinery and parts; sales of basic railway transport equipment; research and development of mechanical equipment; manufacturing of automotive parts and accessories; wholesale of automotive parts; retail of automotive parts; processing of mechanical parts and components; sales of mechanical parts and components; manufacturing of metal structures; sales of metal structures; manufacturing of molds; sales of molds; research and development of new materials; import and export of goods; technical import and export; import and export agency; business training (excluding educational training, vocational skills training, and other training requiring licensing approval); sales of industrial textile products; sales of sealing parts; sales of high-performance sealing materials; sales of specialized chemical products (excluding hazardous chemicals). Licensed projects: manufacturing of basic railway transport equipment; inspection and testing of special equipment; inspection and testing services.