Also, at no time did anyone ever ask to see my phone, my cameras (I had three) or ask where we had been the previous night - we slept several nights in unregistered locations, once in a culvert under the road, once behind a service station, once on the floor of a shed next to a service station and once, in Dabancheng in a cemetery just off the road. No one ever questioned us or asked for anything other than usual passport details
Is that true? Based on Vice's reports last year, journalists and tourists where forced to show their phone to border agents and to install some surveillance app: https://www.vox.com/future-perfect/2019/7/3/20681258/china-u...
It's not Xinjiang, but, as an obviously foreign Westerner, I was waved through the security checkpoints around Tiananmen Square. The setup was geared towards Chinese National ID cards, and the guards didn't want to bother with my passport. The main reason for that was probably laziness, but maybe a secondary reason was the goal of the security was mainly to control the domestic population for political reasons, and foreigners don't figure into that goal.