Modification and sales of: motorized medical vehicles, temperature-controlled vehicles, cleaning vehicles, motorized environmental monitoring vehicles, motorized tow repair vehicles, sport utility vehicles, fence-type vehicles, intelligent traffic accident scene investigation vehicles, dump trucks, and box-type vehicles (excluding traditional fuel vehicles, low-speed vehicles, and fire trucks); production and sales of special vehicles and parts; sales of: automotive parts, Class I, II, and III medical devices, instruments and meters, mechanical equipment, hardware products, daily necessities (excluding food), and electronic products; transport packaging services; automotive detailing; state-permitted goods and technology import and export trade.