What is believed to be secret documents from Chinese authorities has been leaked to researcher Adrian Zenz. He specializes in China's campaigns against religious minorities and, after examining the documents, he believes they are genuine.

In such cases, it is a register of suspects in the Xinjiang region of western China. Over 3,000 names are on the list - and it shows what they are suspected of and why they may need to be sent to a so-called retraining camp.

Sufficient to have a beard

The retraining camps have been described as camps where mainly Muslim minority groups are forced to learn loyalty to the central government in Beijing.

The new documents now make it clearer what is needed for people to be sent there. To suspect it can be anything from a person wearing a beard or veil to having accidentally clicked on a link to a foreign website.

- People are put in retraining camps just because they belong to a certain demographic category. It may be that they are younger than 40 years or that they have practiced something that even resembles religion, says Adrian Zenz.

He continues:

- It is about ordinary religious cultural expressions. They may have prayed table prayer or sometimes gone to the mosque.

Apply for a passport

In addition to clear religious connections, people are suspected even if they have too many children or too many contacts with abroad, according to the documents. Several people have been taken to retraining camps just because they have applied for a passport.

In the clip above, the Uiguren tells Tougeluke Haimiti who has settled in Sweden about how his parents sit in camp, probably because their son lives in Sweden.