Manufacturing of railway rolling stock; manufacturing of special equipment; design of special equipment; design of railway rolling stock; installation, modification, and repair of special equipment; repair of railway rolling stock; surveying and mapping services; manufacturing of large amusement rides. General items: technical services, technical development, technical consulting, technical exchange, technology transfer, and technology promotion; manufacturing of narrow-gauge rolling stock; manufacturing of urban rail transit equipment; manufacturing of railway rolling stock parts; manufacturing of trams; manufacturing of ordinary outdoor amusement park ride equipment (excluding large amusement rides); development of rail transit operation management systems; development of rail transit communication and signal systems; leasing of special equipment; leasing services (excluding licensed leasing services); Internet of Things technical services; professional design services; information technology consulting services; information consulting services (excluding licensed information consulting services); safety technical training for special operations personnel; sales of trams; sales of railway rolling stock; sales of railway rolling stock parts; sales of railway transport equipment; sales of ordinary outdoor amusement park ride equipment; sales of special equipment; sales of rail transit special equipment, key systems, and components; sales of railway transport infrastructure equipment; railway transport auxiliary activities; tourism development project planning and consulting; scenic area management; small-scale recreational activities in parks and scenic spots; landscaping engineering construction; earthwork engineering construction; import and export of goods; import and export of technologies; foreign contracting projects.