China’s trains are categorized based on speed and onboard services, indicated by their train numbers. Train numbers consist of a letter (such as G, D, C, Z, T, K) followed by digits, with the letter representing the train type and service level.

G-Trains: High-speed bullet trains running at speeds between 250 and 400 km/h. These are the fastest trains, offering quick and comfortable travel.
D-Trains: Regular high-speed trains with speeds ranging from 160 to 250 km/h, connecting major cities efficiently.
C-Trains: Intercity high-speed trains operating at speeds between 160 and 300 km/h, ideal for short-distance travel within metropolitan areas.
Z-Trains: Non-stop express trains running at speeds of 140 to 160 km/h, providing direct routes with fewer stops.
T-Trains: Special fast trains traveling at 120 to 140 km/h, offering a balance between speed and accessibility.
K-Trains: Regular fast trains with speeds from 110 to 120 km/h, serving many routes across China.

There are two types of metro tickets: token tickets and IC cards.
●Token tickets are plastic tokens used for single trips on the day of purchase, available from ticket machines.
For frequent travelers, the rechargeable IC card is a great option, offering a 5% discount on fares and can also be used on buses. IC cards start at a 50 RMB deposit and come in fun designs like Doraemon and Hello Kitty, in addition to the standard style.