What do l, a, t, d, l, z and k before the train number stand for respectively?

Through express train (abbreviated as through express, pronounced as through train)

T-special express (short for express delivery, pronounced special) (inter-office: 1 ~ 399, in-pipe 40 1 ~ 999)

K- express train (short for: express train, pronounced as: express train)

N-the express train within the railway administration.

X-direct mail baggage train (pronunciation: OK).

Temporary train: (cross-bureau: 1 ~ 499, in-pipe 50 1 ~ 999)

L- temporary passenger train (short for: temporary passenger, pronounced as: temporary)

A —— Add cars temporarily as needed (abbreviated as: temporary adding cars, pronounced as: a).

Y- temporary tourist train (abbreviated as tourist train, pronounced tourist)

Letters:

Pukuai: short for (direct reading train number)

1001~1999-through express (over three innings)

2001~ 2999-through train (across the second bureau)

400 1 ~ 5999 —— ordinary passenger express train within the administration of railway bureau

Abbreviation: Puke (slow)

600 1 ~ 8999- ordinary passenger train (local train)

57 XXX-Road train, ordinary passenger class.

After six references, add:

D- new high-speed bullet train (pronunciation: mobile)

Examples are as follows:

Z 13 Beijing-Shanghai

T 12 Shenyang North-Beijing

K 107 Beijing-Xuzhou

N25 1 Tianjin -TEDA

X77 Da Lang-Tianjin West

L80 1 Beijing West-Fangshan

A63 Beijing-Jiamusi

Y509 Beijing-Qinhuangdao

Some trains don't respect this principle. For example, No.4483 Tianjin-Taiyuan is an inter-bureau express (because taiyuan railway administration was a sub-bureau at that time and was under the control of Beijing Bureau), No.5712 trains are ordinary passengers, and No.33 trains are fast or slow-some sections are priced according to ordinary passengers.