A document that appears to give the most powerful insight yet into how China determined the fate of hundreds of thousands of Muslims held in a network of internment camps has been seen by the BBC, APA reports.
Listing the personal details of more than 3,000 individuals from the far western region of Xinjiang, it sets out in intricate detail the most intimate aspects of their daily lives.
The painstaking records - made up of 137 pages of columns and rows - include how often people pray, how they dress, whom they contact and how their family members behave.
China denies any wrongdoing, saying it is combating terrorism and religious extremism.
The document is said to have come, at considerable personal risk, from the same source inside Xinjiang that leaked a batch of highly sensitive material published last year.
One of the world's leading experts on China's policies in Xinjiang, Dr Adrian Zenz, a senior fellow at the Victims of Communism Memorial Foundation in Washington, believes the latest leak is genuine.
"This remarkable document presents the strongest evidence I've seen to date that Beijing is actively persecuting and punishing normal practices of traditional religious beliefs," he says.
One of the camps mentioned in it, the "Number Four Training Centre" has been identified by Dr Zenz as among those visited by the BBC as part of a tour organised by the Chinese authorities in May last year.
Much of the evidence uncovered by the BBC team appears to be corroborated by the new document, redacted for publication to protect the privacy of those included in it.
It contains details of the investigations into 311 main individuals, listing their backgrounds, religious habits, and relationships with many hundreds of relatives, neighbours and friends.
Verdicts written in a final column decide whether those already in internment should remain or be released, and whether some of those previously released need to return.
It is evidence that appears to directly contradict China's claim that the camps are merely schools.
In an article analysing and verifying the document, Dr Zenz argues that it also offers a far deeper understanding of the real purpose of the system.
It allows a glimpse inside the minds of those making the decisions, he says, laying bare the "ideological and administrative micromechanics" of the camps.
Row 598 contains the case of a 38-year-old woman with the first name Helchem, sent to a re-education camp for one main reason: she was known to have worn a veil some years ago.
It is just one of a number of cases of arbitrary, retrospective punishment.
Others were interned simply for applying for a passport - proof that even the intention to travel abroad is now seen as a sign of radicalisation in Xinjiang.
In row 66, a 34-year-old man with the first name Memettohti was interned for precisely this reason, despite being described as posing "no practical risk".
And then there's the 28-year-old man Nurmemet in row 239, put into re-education for "clicking on a web-link and unintentionally landing on a foreign website".
Again, his case notes describe no other issues with his behaviour.
The 311 main individuals listed are all from Karakax County, close to the city of Hotan in southern Xinjiang, an area where more than 90% of the population is Uighur.
Predominantly Muslim, the Uighurs are closer in appearance, language and culture to the peoples of Central Asia than to China's majority ethnicity, the Han Chinese.
In recent decades the influx of millions of Han settlers into Xinjiang has led to rising ethnic tensions and a growing sense of economic exclusion among Uighurs.
Those grievances have sometimes found expression in sporadic outbreaks of violence, fuelling a cycle of increasingly harsh security responses from Beijing.
It is for this reason that the Uighurs have become the target - along with Xinjiang's other Muslim minorities, like the Kazakhs and Kyrgyz - of the campaign of internment.
The "Karakax List", as Dr Zenz calls the document, encapsulates the way the Chinese state now views almost any expression of religious belief as a signal of disloyalty.
To root out that perceived disloyalty, he says, the state has had to find ways to penetrate deep into Uighur homes and hearts.
In early 2017, when the internment campaign began in earnest, groups of loyal Communist Party workers, known as "village-based work teams", began to rake through Uighur society with a massive dragnet.
With each member assigned a number of households, they visited, befriended and took detailed notes about the "religious atmosphere" in the homes; for example, how many Korans they had or whether religious rites were observed.
The Karakax List appears to be the most substantial evidence of the way this detailed information gathering has been used to sweep people into the camps.
It reveals, for example, how China has used the concept of "guilt by association" to incriminate and detain whole extended family networks in Xinjiang.
For every main individual, the 11th column of the spreadsheet is used to record their family relationships and their social circle.