Literally every single source of the Uyghur genocide goes back to a single study conducted by Adrian Zenz done on a sample size of 8 people from the same village "how many people do you know are in re-education camps", that % is extrapolated to the entire population of Xinjiang to get the estimates of incarceration, then it was published by Radio Free Asia. The millions of people in camps thing was different outlets reporting a singular article done by one guy named Adrian Zenz. Literally look at any article and look into it and they trace back to Radio Free Asia or Zenz.
You can actually go to the Wikipedia article you linked, go to sources, go to the sources' sources and it traces back to Adrian Zenz interviewing 8 people.
Literally every single source of the Uyghur genocide goes back to a single study conducted by Adrian Zenz done on a sample size of 8 people from the same village "how many people do you know are in re-education camps", that % is extrapolated to the entire population of Xinjiang to get the estimates of incarceration, then it was published by Radio Free Asia. The millions of people in camps thing was different outlets reporting a singular article done by one guy named Adrian Zenz. Literally look at any article and look into it and they trace back to Radio Free Asia or Zenz.
You can actually go to the Wikipedia article you linked, go to sources, go to the sources' sources and it traces back to Adrian Zenz interviewing 8 people.