Passenger cars are classified according to the length of the vehicle: mini passenger cars-length less than 3.5m; light passenger cars-length 3.5-7m; medium passenger cars-length 7-10m; large passenger cars-length 10-12m; extra-large passenger cars-including There are two types of articulated buses (vehicle length greater than 12m) and double-decker buses (length 10-12m), such as the SK6141A3 articulated bus produced by Shanghai Bus Factory and the JL6121S double-decker bus produced by Nanjing Jinling Double-Decker Bus Factory. China stipulates that the length of passenger trains generally does not exceed 18 meters. According to the different service modes, the structure of the bus is also different, which can be divided into tourist buses, urban public buses, highway buses, railway buses, tourist buses and school buses. For more details, please visit http://www.keche.com/20.html