Manufacture of railway transport infrastructure equipment, repair of railway locomotives and rolling stock, design of railway locomotives and rolling stock, manufacture of railway locomotives and rolling stock, installation, modification, and repair of special equipment, electrical installation services, manufacture of special equipment, manufacture of road motor vehicles, urban public transport. General items: Manufacture of intelligent basic manufacturing equipment, manufacture of urban rail transit equipment, manufacture of new energy prime mover equipment, sale of new energy prime mover equipment, sale of rail transit special equipment, key systems and components, manufacture of railway locomotive and rolling stock parts, sale of railway locomotive and rolling stock parts, sale of railway locomotives and rolling stock, manufacture of special equipment (excluding licensed professional equipment), repair of special equipment, manufacture of general equipment (excluding special equipment), repair of general equipment, repair and maintenance of motor vehicles, sale of rail transit engineering machinery and parts, manufacture of optical fibers, sale of optical fibers, manufacture of optical communication equipment, manufacture of optoelectronic devices, sale of optical communication equipment, sale of complete new energy vehicles, sale of new energy vehicle electrical accessories, manufacture of motors, manufacture of batteries, sale of batteries, manufacture of electric motors, sale of intelligent basic manufacturing equipment, manufacture of automotive parts and accessories, system integration services for artificial intelligence industry, intelligent control system integration, processing of mechanical parts and components, software development, manufacture of construction engineering machinery, installation services for general mechanical equipment, goods import and export, technology import and export, import and export agency, sale of special equipment, manufacture of trams, sale of trams, recycling of productive scrap metal, sale of再生资源, processing of再生资源, information system integration services, sale of daily-use masks (non-medical), retail of medical masks, internet sales (excluding goods requiring sales permits), sale of Class I medical devices, sale of Class II medical devices.