A train designed to run on Beijing's new airport subway line makes its debut on Jan 29, 2019. [Photo/IC]

Subway trains designed to run on Beijing's new airport subway line, which links the Beijing Daxing International Airport and Caoqiao subway station in downtown Beijing, made its debut on Tuesday.

The trains are capable of fully automated driverless operation, and with a designed speed of 160 kilometers per hour, they are the fastest subway trains in China. The 40-km journey from Caoqiao station to the capital's new airport will only take 19 minutes. Currently, the travel speed of most subway trains is 80 km/h.