Wi-Fi is going to be available on all high-speed trains in the future, said Huang Min, the deputy-general manager of China Railway Corporation, the country's railway operator, on Sunday.

Free Wi-Fi access is already available on the Shanghai-Beijing line on which the country's new-generation bullet trains Fuxing run.

Wi-Fi services on high-speed trains are rather different from what is used at homes and offices. The stability of the internet speed in tunnels and mountainous areas is a major obstacle to overcome in improving Wi-Fi services on high-speed trains.

The services on China's bullet trains have been greatly boosted over the past few years thanks to the introduction of advanced technologies. Passengers are able to book ticket online, pay through mobile app, and even order takeout food on trains.

Besides, face-recognition technology is used in some major railway stations and is expected to be promoted nationwide.