Many cyclists believe that when the bicycle stops, it is just right to just step on the ground. People of the older generation also think so and feel that it is safe. However, when you sit on the seat and stop and your feet can reach the ground, the height of the seat is wrong. Many riders feel that they are unable to ride, and their knees are uncomfortable. In fact, the fault is caused by the incorrect seat height. The correct seat height is that when we are riding, the forefoot of the foot is on the pedal, and when we step on the lowest position, our knees are guaranteed to be slightly bent. This is the correct height of the seat. When parking, the safest way to park is to straddle the bicycle frame beam and the bicycle slightly to one side. If your bicycle beam is against the crotch, the Guangzhou bicycle manufacturer recommends changing the frame, because the frame size is wrong.