Design, research, development, manufacturing, and sales of large, medium, and light buses and chassis; design, research, development, manufacturing, and sales of special-purpose vehicles and chassis; design, research, development, manufacturing, and sales of road administration special vehicles and mechanical products; design, research, development, manufacturing, and sales of fire trucks; sales of auto parts; after-sales service for motor vehicles; vehicle repair; software development; instrument manufacturing; automotive and information technology services and consulting; import and export of goods and technology; vehicle dismantling and recycling; remanufacturing of auto parts; vehicle leasing; manufacturing, sales, and installation of pressure vessels; operation (wholesale) of Class I, II, and III medical devices; export business of self-produced products and technologies of the enterprise and its member enterprises; import business of raw materials, instruments, mechanical equipment, parts, and technologies required for scientific research and production of the enterprise and its member enterprises. Design, research, development, manufacturing, and sales of automobiles and automobile chassis; design, research, development, manufacturing, and sales of medical vehicles; design, research, development, manufacturing, and sales of special-purpose trucks; design, research, development, manufacturing, and sales of shelters.