Special vehicles refer to various types of special tank trucks, various special motor vehicles, and van motor vehicles; or vehicles equipped with fixed special instruments and equipment for professional work such as monitoring, firefighting, cash transportation, and medical treatment. , television broadcast, radar, X-ray inspection and other motor vehicles. Special vehicles are based on the structural characteristics of the vehicle itself. Compared with the traditional structural form of the ordinary truck chassis, the structure of the chassis and the vehicle is quite special. It is a specially designed vehicle that rarely uses general-purpose assembly components. The background colors of license plates include blue, yellow, white, and black. Blue is the license plate for small vehicles (including small-tonnage trucks), yellow is the license plate for large vehicles or agricultural vehicles and trainer vehicles, and there are also test vehicles for new products. Motorcycles are also yellow cards. The white ones are special vehicle license plates, and the black ones are license plates for foreign companies and foreign companies bringing their own vehicles from abroad. Large civilian cars: black letters on a yellow background; small civilian cars: white letters on a blue background; armed police vehicles: red "WJ" on a white background and black letters; other foreign cars: white letters on a black background; foreign cars for embassies and consulates: white letters on a black background and Hollow sign with the word "make"; Trial license plate: Red lettering on a white background, with the word "Trial" in front of the number; Temporary license plate: Red lettering on a white background, with the word "temporary" in front of the number; Replacement license plate: Black lettering on a white background. In addition, the civil vehicle license plate has the name of the province, municipality, and autonomous region and the code of the licensing and supervisory authority. The number is in English capital letters. The car number at the end is usually 5 digits, ranging from 00001 to 99999. When the number exceeds 100,000, it is replaced by English letters such as A, B, C, etc., that is, A represents 100,000, B represents 110,000, C represents 120,000, and the last letter and Z represent 330,000. The I and O in English letters should be avoided to avoid confusion with the 1 and 0 in numbers. The small number on the foreign car license plate of the embassy or consulate is the code name of the country that has diplomatic relations, and has nothing to do with the regulatory number of the region.