Business class seat numbers are divided into AC and F, where A is window and F is window and corridor; The first-class seats are numbered AC and d F, where A and F are near the window, and the second-class seats are numbered ABC and DF, where A and F are near the window and B is in the middle of AC. Seats A and F must be by the window.

The difference between first-class and second-class seats is:

1. There are four people in the first class and five people in the second class, so the aisle in the first class is wider than that in the second class, giving people a spacious and comfortable feeling. Relatively speaking, the second-class seat makes people feel depressed and bored, and the air conditioner is not as comfortable as the first-class seat.

2. There are car TVs in front of and behind the first-class seat of the motor train, and the view outside the window is wide, and the scenery seen by passengers is clearer. The window view of the second class seat is not as wide as that of the first class seat, and the scenery is not as good as that of the first class seat.

3. Both the first-class seat and the second-class seat can be rotated, and passengers can sit face to face, but passengers in the first-class seat can play cards with the dining table, and passengers in the second-class seat can't play cards because the dining table is behind the seat.

The bathroom in the first class seat is spacious and bright, which is for the disabled. The bathroom in the second-class seat is narrower than that in the first-class seat, but the sanitary products are fully equipped.