Border authorities routinely install the app on the phones of people entering the Xinjiang region by land from Central Asia, gathering personal data and scanning for material considered objectionable.
By Raymond Zhong
BEIJING - China has turned its western region of Xinjiang into a police state with few modern parallels, employing a combination of high-tech surveillance and enormous manpower to monitor and subdue the area's predominantly Muslim ethnic minorities.
Now, the digital dragnet is expanding beyond Xinjiang's residents, ensnaring tourists, traders and other visitors - and digging deep into their smartphones.
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