The movement of the front seat of the big dipper is blocked.

Does the subject want to ask "why the front seat of the Big Dipper is stuck"? Insufficient lubrication of the slide rail, and the slide rail is damaged.

1. Insufficient lubrication of slide rail: Insufficient lubrication of seat moving guide rail will cause the seat to get stuck when moving. The solution is to apply lubricating oil to the track.

2. Slide rail damage: If the seat moving track is damaged, it will cause the seat to get stuck when moving. The solution is to replace the damaged track.