Production of road motor vehicles; manufacturing of special equipment; design of special equipment; installation, modification and repair of special equipment; operation of Class III medical devices; general items of Class III medical device production: automobile sales; sales of special equipment; sales of machinery and equipment; manufacturing of special equipment (excluding manufacturing of licensed professional equipment); Sales of generators and generator sets; manufacturing of special equipment for traffic safety and control; sales of electronic products; sales of automobile decorative supplies; research and development of automobile parts; research and development of motorcycles and parts; sales of new energy vehicles; sales of new energy vehicle electrical accessories; sales of motor vehicle charging; sales of charging piles; mechanical equipment Equipment research and development; engineering and technology research and experimental development; Internet of Things technology research and development; retail of automobile parts and accessories; retail of motorcycles and spare parts; manufacturing of automobile parts and accessories; sales of first-class medical devices; sales of second-class medical devices; information technology consulting services; technical services, technology development, and technical consulting , technology exchange, technology transfer, technology promotion; fire protection equipment sales; Internet of Things equipment manufacturing; Internet of Things equipment sales; information security equipment sales; software development; information system integration services; intelligent vehicle equipment manufacturing; intelligent vehicle equipment sales; intelligent unmanned aerial vehicle sales; motor vehicle repair and maintenance