China Train Types Explained: What G, D, C, Z, T and K Actually Mean

Last updated: September 2026

The letter in front of a Chinese train number tells you its speed class. G trains are high-speed rail (300-350 km/h), D trains are EMUs (200-250 km/h), C trains are short-distance intercity services, and Z, T and K are conventional trains running at 160, 140 and 120 km/h. Pick by distance and urgency, not by price alone.

Once you can read that letter, booking Chinese trains stops being intimidating.

What do the letters stand for?

Each letter is the first letter of the Chinese word for the service type:

Numbers with no letter at all are the slowest services, stopping at almost every station.

G trains: the ones you will actually use

G trains run only on dedicated high-speed lines and are the backbone of foreign travel in China. Beijing to Shanghai, Beijing to Xi'an, Xi'an to Chengdu, Guangzhou to Shenzhen - if a route matters to tourists, there is a G train on it.

They stop at fewer stations and are punctual to a degree that surprises first-time visitors. On board: air conditioning, a power socket at every seat, a dining car or trolley service, and luggage racks at the end of each carriage.

D trains: slightly slower, sometimes overnight

D trains are EMUs that can run on both high-speed and conventional track. At 200-250 km/h they are barely slower than G trains on many routes and often cheaper.

Two D variations matter for travellers. Some run long-distance during the day with fewer stops. Others are overnight sleepers - the berth versions of the high-speed network. A D sleeper from Beijing to Xi'an or Shanghai to Xi'an gives you a hotel night for the price of a berth.

C trains: short hops between neighbouring cities

C stands for intercity. These serve dense city pairs: Beijing to Tianjin in about half an hour, Guangzhou to Zhuhai, Kunming to Xishuangbanna. Departures are frequent, journeys are short, and second class is all you need.

Z, T and K: the green trains

Conventional trains are still the cheapest way to cross China, and for some routes they are the only direct option.

• Z (direct express) - 160 km/h, few or no intermediate stops, mostly overnight. This is where you find the deluxe soft sleeper: a two-berth cabin.
• T (express) - 140 km/h, long-distance with more stops, recognisable by the dark green livery.
• K (fast) - 120 km/h, many stops, the workhorse of the conventional network.

Unless you are travelling on a tight budget or want the experience, high-speed rail is the better use of a short trip. Overnight Z and T sleepers, however, remain excellent value for long distances such as Beijing to Guangzhou.

Seat classes: what you are actually buying

On G, D and C trains:

• Business class (G trains only) - 1+2 or 1+1 seating, lie-flat or near lie-flat seats, the most expensive by a wide margin.
• First class - 2+2 seating, no middle seats, noticeably more room.
• Second class - 3+2 seating, the most common and cheapest option. Perfectly comfortable for journeys up to about five hours.

On conventional trains:

• Hard seat - bench-style, crowded, cheapest.
• Soft seat - cushioned, air-conditioned, for shorter daytime runs.
• Hard sleeper - six berths in an open compartment, three tiers.
• Soft sleeper - four berths in an enclosed compartment.
• Deluxe soft sleeper - two berths and, on some services, a private washroom. Booked on Z trains.

How to book with a foreign passport

1. Register on the official 12306 app or website using your passport details.
2. Search by city and date, and choose the train class you want.
3. Pay with an international card where supported - 12306 accepts major international cards for foreign users, and you can also pay at the station counter for some bookings.
4. Your passport is your ticket. There is nothing to print and collect: scan the passport at the gate.

Third-party booking platforms work too and can be convenient for English-language support, but they add a service fee and occasionally mis-map passport data. If a booking fails, 12306 is the authoritative source.

Boarding: what the process looks like

• Security screening at the station entrance, similar to an airport but faster. No liquid limits.
• Find your train on the departure boards, then the waiting area for your gate.
• Boarding usually opens 15 minutes before departure and closes a few minutes before it.
• Scan your passport at the gate and again at the platform barrier where fitted.
• Carriage and seat numbers are marked on the platform; the train only stops for a few minutes at intermediate stations.

Allow 30-40 minutes at large stations such as Beijing West or Shanghai Hongqiao. They are the size of airports.

When to choose which

• City to city, under 6 hours: G train, second class.
• Overnight, want to save a hotel night: D sleeper or Z soft sleeper.
• Short intercity hop: C train.
• Budget, no time pressure: K or T train.

If you are weighing rail against flying for a domestic leg, the train usually wins inside the eastern network - see our rail-based 10-day itinerary for how that plays out in practice.

Frequently asked questions

What does the number after the letter mean?

It is the route or service number, not a ranking. A higher number does not mean a better or faster train - a G1 and a G1307 are both high-speed services.

Are G trains always faster than D trains?

Not always. On some routes the difference is 20 minutes; on others it is two hours. Compare the actual journey time, not the letter alone.

Can I buy a ticket on the day of travel?

Often yes, but not on holiday dates or popular morning departures. Book ahead when you can.

What is the difference between hard and soft sleeper?

Hard sleeper is six berths per open compartment with three tiers; soft sleeper is four berths in a closed compartment. Both include bedding. Deluxe soft sleeper has two berths.

Do trains have Wi-Fi?

Many high-speed trains advertise Wi-Fi, but reliability varies. A local SIM or travel eSIM is the dependable option.

Start with China High-Speed Rail 2026 for the network overview, Beijing to Shanghai by High-Speed Rail for the flagship route, or browse train tours for international tourists.