Research and development of mechanical equipment; manufacturing of general equipment (excluding special equipment); sales of mechanical equipment; leasing of mechanical equipment; sales of special equipment; leasing of special equipment; manufacturing of domestic waste treatment equipment; sales of domestic waste treatment equipment; manufacturing of environmental protection specialized equipment; sales of environmental protection specialized equipment; manufacturing of general parts; manufacturing of automotive parts and accessories; sales of mechanical parts and components; processing of mechanical parts and components; sales of automobiles; sales of new energy vehicles; wholesale of automotive parts; operation of used car trading markets; research and development of intelligent robots; sales of intelligent robots; sales of artificial intelligence hardware; manufacturing of special operation robots; technical services, technical development, technical consulting, technical exchange, technology transfer, and technology promotion; sales of internet of things equipment; manufacturing of internet of things equipment; internet of things technical services; network technical services; software development; procurement agency services; sales agency; trade brokerage; information consulting services (excluding licensed information consulting services); conference and exhibition services; loading and unloading; domestic freight forwarding; international freight forwarding; advertising design and agency; advertising production; information technology consulting services; sales of pleasure boats and sports boats; sales of lubricating oil; property management; general cargo storage services (excluding items requiring permits such as hazardous chemicals); leasing of land use rights; leasing of non-residential real estate; internet sales (excluding goods requiring sales permits); leasing of storage equipment; leasing of construction machinery and equipment; import and export of goods. Licensed items: manufacturing of special equipment; commercial domestic waste collection services; catering services; construction engineering design; construction engineering construction; production of road motor vehicles.