What I don't understand is why they leave the app installed on the person's phone after the scan if it does not do any further scanning in the background.
>>redwar+(OP)
Seems to me like carelessness / incompetence. One of the articles I've read on this topic suggested that in most cases they remove the app.
>>redwar+(OP)
The app is to monitor foreigners and the natives, while they're in Xinjiang. Deleting the app on just one scan would be defeating the purpose.