Class III medical device operation, Medical device internet information service, Road motor vehicle production, Special equipment design, Special equipment manufacturing, Installation, repair and testing of power transmission, power supply and power receiving facilities. General items: Manufacturing and sales of: Cash transport vehicles, special vehicles, special purpose vehicles (special passenger vans, special cargo trucks, special operation vehicles), medical vehicles, ambulances, transport-type ambulances,监护-type ambulances, surgical vehicles, dining vehicles, cooking vehicles, camping vehicles, shower vehicles, water purification vehicles, power vehicles, emergency trailers, dining trailers, travel trailers, monitoring trailers, inspection trailers, container demountable vehicles and parts; After-sales service for cash transport vehicles, special vehicles and their instruments, meters and parts; Production and sales of protective materials and products; Export business of self-produced products and technology and import business of required mechanical equipment, parts, raw auxiliary materials and technology; Development, manufacturing and sales of RVs; RV camping, campground planning and design, operation; Class I medical device wholesale; Class II medical device wholesale; Class I medical device retail; Class II medical device retail; Gas and liquid separation and purification equipment manufacturing; Gas and liquid separation and purification equipment sales; Special equipment sales; Thermal and sound insulation material manufacturing; Thermal and sound insulation material sales; Motor vehicle repair and maintenance; General equipment repair; Special equipment repair; Electrical equipment repair; Instrument and meter repair; Communication equipment repair; Electronic and mechanical equipment maintenance (excluding special equipment); Coating manufacturing (excluding hazardous chemicals); Coating sales (excluding hazardous chemicals); Spray processing; Power facility equipment manufacturing; Power facility equipment sales; Power distribution switchgear equipment manufacturing; Power transmission and distribution and control equipment manufacturing; Intelligent power transmission and distribution and control equipment sales; Charging pile sales; Motor vehicle charging sales; Centralized fast charging stations; Battery manufacturing; Battery sales; Mechanical and electrical equipment manufacturing; Mechanical and electrical equipment sales.