New material technology research and development; technical services, technical development, technical consulting, technical exchange, technology transfer, and technology promotion; IoT technology research and development; bio-based material technology research and development; software development; motor and its control system research and development; mechanical equipment research and development; coating manufacturing (excluding hazardous chemicals); coating sales (excluding hazardous chemicals); labor services (excluding labor dispatch); engineering management services; software outsourcing services; special equipment manufacturing (excluding licensed special equipment manufacturing); mechanical equipment sales; railway locomotive and rolling stock parts manufacturing; railway locomotive and rolling stock parts sales; railway transportation auxiliary activities; railway transportation infrastructure equipment sales; synthetic material manufacturing (excluding hazardous chemicals); synthetic material sales; IoT equipment manufacturing; IoT equipment sales; IoT application services; IoT technical services; internet sales (excluding products requiring sales permits); consulting and planning services; information technology consulting services; internet data services; software sales; domestic trade agency. Licensed items: Construction engineering construction.