ABCDF is the seat number of EMU, and ordinary trains are arranged according to the number of 123. Second-class AF is by the window, first-class AD is by the window, business class A is by the window, and BC may be by the window.

The mantissa of the window seat number of model 22 is 0, 4, 5 and 9. The mantissa of the window seat number of type 23 is 2, 3, 7 and 8. In addition, the number of rows of cars with conductor office seats does not follow the above rules. Generally, the seats with the tail numbers 0, 4, 5 and 9 are all by the window.

Other train cars are the same, but there is one difference, that is, the car with the conductor's office ticket hanging in the middle, in which the conductor's desk occupies several positions. In a car with a conductor, the dining car is usually at No.9 9- 10/0. The conductor's office is behind the dining car, and the chimney on the top of the dining car is easy to distinguish.

Train model:

There are many kinds of railway passenger cars, which are divided into hard seat car (YZ), hard sleeper car (YW), soft sleeper car (RZ) and soft sleeper car (RW). According to the number of car bodies, it is divided into single-deck cars and double-deck cars.

At present, the common models are: the second generation: 2222B (also known as "green leather car") and the third generation: 25A, 25B, 25t, 25k and 25g. The same kind of car, for example, 25G, can be divided into hard-seat car, soft-seat car, hard-sleeper car and soft-sleeper car, corresponding to YZ25G, RZ25G, ZW25G and RW25G respectively.