You ask what's the harm of taking a five-hour, three-hour car-free ride? It is easy to have a flat tire and the vehicle is out of control. "Five small" cars refer to two-wheeled electric vehicles, two-wheeled motorcycles, three-wheeled motorcycles and four-wheeled electric vehicles, as well as three kinds of vehicles without license plates, driving licenses and road maintenance fees. This kind of vehicle is easy to bend, which causes the tire sidewall to rupture, thus leading to a puncture. In the process of puncture, the vehicle is easily out of control, which is very dangerous.