Then came a stage I was not prepared for. "Faceprint is required for security purposes," it said. I was instructed to hold my phone up - to "face front camera

Then came a stage I was not prepared for. "Faceprint is required for security purposes," it said. I was instructed to hold my phone up - to "face front camera straight on" - looking directly at the image of a human head. Then told to "Read numbers aloud in Mandarin Chinese". My voice was captured by the App at the same time it scanned my face. Afterwards a big green tick: "Approved"