Manufacture of general equipment (excluding special equipment); manufacture of automotive parts and accessories; manufacture of general parts; repair and maintenance of motor vehicles; manufacture of high-speed rail equipment and accessories; sales of high-speed rail equipment and accessories; auxiliary activities for railway transport; sales of ships; manufacture of computer software and hardware and peripherals; manufacture of integrated circuit chips and products; manufacture of other electronic devices; sales of mechanical and electrical equipment; manufacture of machine tool functional parts and accessories; general application systems for artificial intelligence; sales of insulation materials; manufacture of lightweight building materials; sales of chemical products (excluding licensed hazardous chemicals); retail of hardware products; wholesale of hardware products; wholesale of electronic components; industrial engineering design services; technical services, technical development, technical consulting, technical exchange, technology transfer, and technology promotion. Licensed items: repair of railway locomotives and vehicles; design and production of civil aircraft parts; import and export of goods.