Manufacturing of road motor vehicles; disposal of urban construction waste (removal and transport). General items: manufacturing of environmental protection specialized equipment; sales of environmental protection specialized equipment; research and development of mechanical equipment; sales of mechanical equipment; maintenance of electronic and mechanical equipment (excluding special equipment); technical services, technical development, technical consulting, technical exchange, technology transfer, technology promotion; sales of fire-fighting equipment; wholesale of auto parts; retail of auto parts; sales of mechanical parts and components; repair of general equipment; repair of specialized equipment; environmental sanitation management (excluding environmental quality monitoring, pollution source inspection, and disposal services for urban household waste, construction waste, and kitchen waste); professional cleaning, washing, and disinfection services; landscaping engineering construction.