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

Distribution of train window seat numbers;

Generally, the second-class seat of the bullet train is a window seat with the tail numbers 1, 6, 5 and 0, while the first-class seat is a window seat with the tail numbers "multiple of 4" and "multiple of 4+1", and 15 does not face the window.

Distribution of window seats on Z, K and other ordinary trains:

The train car is usually 1 18 seats, and the seat number is 1-40, which is close to the crew lounge. No. 80- 1 18 is at the other end of the carriage; 4 1-79 is in the middle of the car. According to the seating arrangement of ordinary cars, the seats with the tail numbers 4, 5, 9 and 0 are all by the window.

Seating arrangements for various types of cars are as follows:

The mantissas of window seats with the number of seats 1 18 are: 4, 5, 9, 10, plus the number of seats 118;

The window seat mantissa of the new airport 1 12 is: 3, 4, 8, 9, plus seat numbers 2, 5,112;

Non-new empty car 1 16 window seat mantissa is: 2, 3, 7, 8, plus seat number 1 16.

Analysis of high-speed railway;

A high-speed railway is different from a high-speed train, just as a track is different from a racing car. High-speed railway is a railway system, and high-speed train is a means of transportation. High-speed railway can be used for both ordinary trains and high-speed trains. High-speed trains can run on two high-speed railways, but the design speed mismatch between railways and trains will restrict the running speed (PS: electrified railway is the premise of electric locomotive running).

1903 introduced high-speed electric locomotives with a speed of more than 200 kilometers per hour, and even steam locomotives set a high-speed record of 202 kilometers per hour as early as 1938. The world's first railway system that can really make high-speed trains run safely and stably for a long time only appeared in Japan in 1964, which is why the Japanese Shinkansen, which was completed and opened to traffic in 1964, is generally considered as the first high-speed railway by the scientific community.

At present, many places in China will adopt the mode of high-speed railway and high-speed railway line combined with high-speed train. For example, the high-speed railway from Zhuhai to Chaoshan (the train starting with G) passes through the Guangzhou-Shenzhen-Hong Kong line belonging to the high-speed railway, the Xiamen-Shenzhen line belonging to the high-speed railway, and even the Guangzhou-Zhuhai intercity railway line with an operating speed of only 200 km/h.

Refer to the above content: Baidu Encyclopedia-High-speed Railway