Road motor vehicle manufacturing; Special equipment manufacturing; Import and export of goods; Car rental; Urban domestic waste operational services; Various construction engineering activities. General items: Motor vehicle modification services; Mining machinery manufacturing; Special machinery for building materials production; Construction engineering machinery manufacturing; Environmental protection special equipment manufacturing; Sludge treatment equipment manufacturing; Special equipment manufacturing (excluding licensed professional equipment manufacturing); Metal structure manufacturing; New car sales; New energy vehicle complete vehicle sales; Used car sales; Auto parts wholesale; Mechanical equipment sales; Environmental protection special equipment sales; Metal structure sales; Domestic trade agency; General equipment repair; Special equipment repair; Mechanical equipment leasing; Non-residential real estate leasing; Residential housing leasing; Water pollution control; Solid waste treatment; Municipal facility management; Property management.