China to revise train-numbering system as railway network expands

China will overhaul its train-numbering system to accommodate its expanding railway network and growing number of train services.

The revised system will also leave room for new lines, equipment, and products, while reserving the X prefix for Fuxing trains with maximum operating speeds above 350 kilometers per hour.

The changes will expand the number of available train numbers for passenger multiple-unit services by nearly 40 percent, according to China State Railway Group, the national railway operator.

During peak travel periods, such as the May Day and National Day holidays, G-series trains — which account for most high-speed services in China — already use more than 90 percent of available G-series numbers, the operator said.

For passengers, including international visitors, some familiar letters will take on new meanings.

Previously used for conventional express and fast trains, T and K will designate multiple-unit trains with maximum operating speeds of 300 km/h and 200 to 250 km/h, respectively. G will designate Fuxing trains with a maximum operating speed of 350 km/h.

The changes will be introduced in two stages, starting with regular-speed passenger trains, tourist trains, and some freight services in late November, followed by high-speed and other services in late December.

The 12306 booking platform will display the new passenger train numbers within the 15-day advance booking window for the affected services.

Travelers should check the updated train number, stations, and departure time for their travel date. Existing onboard services, including quiet carriages and online meal ordering, will remain available.