What does the first letter of the train sequence mean? What l, d, z ... what do you mean?

1 and "t" (special) are super luxury trains of Shanghai Bureau.

2. "D" (moving) is the EMU train operated by Harbin Bureau;

3. "S" (Shenzhen) is an express passenger train operated by guangzhou-shenzhen railway Company;

4. "G" (high) is a high-speed train on the Guangzhou-Shenzhen line (200 kilometers per hour);

5. "Z" (quasi) is a quasi-high-speed train on Guangzhou-Shenzhen line (speed160 km/h);

6. "K" (fast) is a fast train (speed120km or more);

7. "Y" (tourism) is a tourist train running between big cities and tourist cities;

8. "L" (Road) is a temporary passenger train added during Spring Festival travel rush and Summer Games when passenger traffic is busy;

9. The "X" (line) is a special baggage and parcel train for centralized transportation of vehicles and parcels in a certain direction, and it also belongs to passenger trains.

10, "n" (inside)-express train in the tube (meaning the same as k, we ordinary passengers don't have to make any special difference).