Apple Pay’s Express Transit function is now usable in 275 cities in China. This is due to a partnership between Apple and nationwide transport card provider T-Union (via Macrumors).
Express Transit Now Available Almost Nationwide in China
The service had previously only been available Beijing and Shanghai, where it was integrated with existing local transit cards. It allows users users to put their iPhone in front of a turnstile and go through without having to unlock the device. It also works with Apple Watch.
I’ve used the facility in London. It really does reduce the time going into and out of public transport – no more awkwardly causing a queue as others way for FaceID to recognise you!