Legal basis: Article 54 of the Implementation Regulations of the Road Traffic Safety Law of the People's Republic of China shall not exceed the loading weight approved by the motor vehicle driver's license, and the loading length and width shall not exceed the carriage, and the following provisions shall be observed: (1) The height of heavy and medium-sized trucks and semi-trailers from the ground shall not exceed 4 meters, and the vehicles loaded with containers shall not exceed 4.2 meters; (two) the height of other motor vehicles carrying goods from the ground shall not exceed 2.5 meters; (3) The height of the motorcycle shall not exceed 1.5m from the ground, and the length shall not exceed 0.2m from the body. The load width of two-wheeled motorcycle shall not exceed the handlebar by 0.15m; The load width of a three-wheeled motorcycle shall not exceed the body. Passenger cars are not allowed to carry goods except the luggage rack outside the car body and the built-in luggage compartment. Passenger car luggage rack height from the roof shall not exceed 0.5 meters, height from the ground shall not exceed 4 meters.