Manufacture of urban rail transit equipment; sale of railway locomotive and rolling stock parts; manufacture of railway locomotive and rolling stock parts; sale of railway locomotives and rolling stock; sale of railway transport equipment; sale of railway transport infrastructure equipment; manufacture of narrow-gauge locomotives and rolling stock; development of rail transit operation management systems; sale of green composite materials for rail transit; sale of rail transit special equipment, key systems and components; development of rail transit communication and signal systems; sale of rail transit engineering machinery and parts; leasing of special equipment; sale of ordinary open-air amusement park equipment; manufacture of ordinary open-air amusement park equipment (excluding large amusement rides); landscaping engineering construction; research and development of nuclear power equipment packages and engineering technology; protection services for cultural relics and cultural heritage sites; planning and design management; industrial design services; sale of high-speed rail equipment and accessories; municipal facility management; scenic area management; entertainment activities for small facilities in parks and scenic spots; management of famous scenic spots; protection of intangible cultural heritage; park management services; manufacture of high-speed rail equipment and accessories; manufacture of teaching models and teaching aids. Permitted items: Manufacture of railway locomotives and rolling stock; design of railway locomotives and rolling stock; repair of railway locomotives and rolling stock; installation, modification, and repair of special equipment; design of special equipment; manufacture of railway transport infrastructure equipment; urban public transport; construction engineering design; manufacture of large amusement rides; various construction engineering activities; surveying and mapping services; manufacture of special equipment.