"It is really remarkable," Byler said. "In no other location have we seen entire populations of people be described as terrorists or seen as terrorists."
The crackdown kicked into high gear in 2017, after a string of knifings and bombings by a small handful of Uyghur militants. The Chinese government defended the mass detentions as both lawful and necessary to combat terrorism.
In December 2019, Xinjiang officials said that all of whom they described as "trainees" at the "centers" had "graduated." Visits by Associated Press journalists to four former camp sites confirm that they were shuttered or converted into other facilities.
But the prisons remain. Xinjiang went on a prison-building spree in tandem with the crackdown, and even as the camps closed, the prisons expanded. At least a few campsites were converted into centers for incarceration.
The secretive nature of the charges against those imprisoned is a red flag, experts say. Although China makes legal records easily accessible otherwise, almost 90% of criminal records in Xinjiang are not public. The handful which have leaked show that people are being charged with "terrorism" for acts such as warning colleagues against watching porn and swearing, or praying in prison.
Abduweli Ayup, the Uyghur exile who passed the list to the AP, has closely documented the ongoing repression of his community. But this list in particular floored him: On it were neighbors, a cousin, a high school teacher.
"I had collapsed," Ayup said. "I had told other people's stories …. and now this is me telling my own story from my childhood."
The widely-admired teacher, Adil Tursun, was the only one in the high school in Toquzaq who could teach Uyghur students in Chinese. He was a Communist Party member, and every year his students had the best chemistry test scores in the town.