What do the letters on the train ticket mean?

G The pinyin pronunciation of G Gao Railway means that this train is a high-speed railway, and its speed is generally 300-350km/h.

D The pinyin pronunciation of "dong" means that this train is an electric train, and its speed is generally 200-250km/h.

C The pinyin pronunciation of Cheng (cheng) rail means that this train is an urban rail, with a speed of 200-250km/h. It usually runs between two cities, such as Dongguan-Huizhou rail ( Dongguan-Huizhou).

Z The pinyin pronunciation of zhi (zhi) means that this train is a direct train with a maximum speed limit of 160km/h.

T The pinyin pronunciation of te (te) express means that this train is an express train with a maximum speed limit of 140km/h.

The pinyin pronunciation of K (kuai) means that this bus is an express train with a speed of 90-120km/h.

L Lin (lin) is the Pinyin pronunciation of bus, indicating that this bus is a Lin bus, and the speed is adjusted according to actual conditions.

Extended information:

Principle of train operation:

The bogie of the train is stuck on the track and runs along the track. When turning, the bogie rotates, allowing the train to move along the track. Continue driving along the track. The outer rail is higher than the inner rail when turning.

The original trains were pulled by ropes or horses. By the 19th century, most trains were powered by steam locomotives. After the 1940s, steam locomotives were gradually replaced by diesel locomotives that were cleaner and required less labor. Later, electric locomotives and EMUs appeared.

The initial investment in electrified railways is large, but the operating costs are the lowest on a per-mile basis. Therefore only high traffic lines are suitable for electrification. Electrified trains may use overhead cables or a third rail to draw power.

The efficiency of the power locomotive is calculated by dividing the power unit kilowatt (KW) by the metric ton (Ton) of the weight that can be pulled. It is called the traction capacity ratio. Steam locomotives have the lowest efficiency, followed by diesel locomotives (electric transmission ratio Hydraulic transmission has high efficiency), and electric locomotives or EMUs are relatively more economical. Because there is no need to consume additional kinetic energy to pull the engine that generates power.