While the passenger face recognition system works in experimental mode at the only station in the city of Shenzhen. But technology is developing rapidly, and in the coming years, payment on the face will spread throughout the country.
China is the world leader in the implementation of mobile payments. Cash is losing popularity so quickly that many sellers refuse to accept them. However, it is possible that soon you will not even need a telephone to pay for the services - the purchaser's face will suffice.
The technology was helped by Huawei, which provided artificial intelligence algorithms. Fast and reliable communication is provided by the 5G network.