The front wheel is very special, not parallel, but figure-eight. Like a figure of eight, the distance in front is narrow and the back is wide. This is called toe. Only when two wheels are squeezed in the middle can you go straight. Without toe-in, the car will swing from side to side, that is, the direction will drift; If the toe-in is too tight, the direction is heavy.
The axis of the front wheel steering is also very special. It's not vertical, there are several angles. It has to fall backwards, which is called backward, and it has to fall outwards, which is called outward. Find an experienced master to adjust it.