From New York Times:
Every morning at 9 a.m., they are at his door.
The police come to the small room the young Uighur cook shares with several other Uighurs to check their papers — and to see if there are new arrivals from his homeland of Xinjiang.
He has lived here for six years, peaceably and happily. But in the days preceding the Olympics, things changed. The police had been watching him even before recent violent attacks in Xinjiang but when the Chinese authorities began to warn that a Uighur separatist group was trying to disrupt the Games, the scrutiny intensified.
The Olympic opening ceremony contained traditional Uighur song and dance. But most of the several thousand Uighurs who work here have left.