Residents at the Kashgar city vocational educational training centre dance for visiting reporters and officials in a classroom during a government organised visit in Kashgar, Xinjiang Uighur Autonomous Region, China, January 4, 2019. Picture taken January 4, 2019. TO MATCH INSIGHT CHINA-XINJIANG/ REUTERS/Ben Blanchard 

Residents at the Kashgar city vocational educational training centre attend a Chinese lesson during a government organised visit in Kashgar, Xinjiang Uighur Autonomous Region, China, January 4, 2019. Picture taken January 4, 2019. TO MATCH INSIGHT CHINA-XINJIANG/ REUTERS/Ben Blanchard 

Residents perform for reporters and government officials during a government organised visit to the Karakax county vocational educational training centre in Karakax, Xinjiang Uighur Autonomous Region, China, January 5, 2019. Picture taken January 5, 2019. TO MATCH INSIGHT CHINA-XINJIANG/ REUTERS/Ben Blanchard 

A resident at the Kashgar city vocational educational training centre attends a Chinese lesson during a government organised visit in Kashgar, Xinjiang Uighur Autonomous Region, China, January 4, 2019. Picture taken January 4, 2019. TO MATCH INSIGHT CHINA-XINJIANG/ REUTERS/Ben Blanchard 

Residents at the Kashgar city vocational educational training centre play table tennis during a government organised visit in Kashgar, Xinjiang Uighur Autonomous Region, China, January 4, 2019. Picture taken January 4, 2019. TO MATCH INSIGHT CHINA-XINJIANG/ REUTERS/Ben Blanchard 

Residents at the Kashgar city vocational educational training centre attend a sewing class during a government organised visit in Kashgar, Xinjiang Uighur Autonomous Region, China, January 4, 2019. Picture taken January 4, 2019. TO MATCH INSIGHT CHINA-XINJIANG/ REUTERS/Ben Blanchard 

Residents stand in formation as reporters and officials arrive during a government organised visit to the Hotan county vocational educational training centre in Hotan county, Xinjiang Uighur Autonomous Region, China, January 5, 2019. Picture taken January 5, 2019. TO MATCH INSIGHT CHINA-XINJIANG/ REUTERS/Ben Blanchard 

Residents attend a cooking class during a government organised visit to the Karakax county vocational educational training centre in Karakax county, Xinjiang Uighur Autonomous Region, China, January 5, 2019. Picture taken January 5, 2019. TO MATCH INSIGHT CHINA-XINJIANG/ REUTERS/Ben Blanchard 

Residents perform for reporters and government officials during a government organised visit to the Hotan county vocational educational training centre in Hotan county, Xinjiang Uighur Autonomous Region, China, January 5, 2019. Picture taken January 5, 2019. TO MATCH INSIGHT CHINA-XINJIANG/ REUTERS/Ben Blanchard 

Residents at the Karakax county vocational educational training centre draw the centre during an arts class while reporters are present during a government organised visit in Karakax country, Xinjiang Uighur Autonomous Region, China, January 5, 2019. Picture taken January 5, 2019. TO MATCH INSIGHT CHINA-XINJIANG/ REUTERS/Ben Blanchard 

Ethnic Uighur women leave a centre where political education lessons are held in Kashgar, in Xinjiang Uighur Autonomous Region, China September 6, 2018. As well as forced detention in re-education centres, there are also imposed political education lessons held during the day. This one in the southern city of Kashgar appeared to be comprised of an overwhelmingly female majority. Picture taken September 6, 2018. To match Special Report MUSLIMS-CAMPS/CHINA REUTERS/Thomas Peter 

A Chinese police officer takes his position by the road near what is officially called a vocational education centre in Yining in Xinjiang Uighur Autonomous Region, China September 4, 2018. Picture taken September 4, 2018. To match Special Report MUSLIMS-CAMPS/CHINA REUTERS/Thomas Peter 

A Chinese police officer armed with an automatic weapon gestures towards reporters at a roadblock near what is officially called a vocational education centre in Yining in Xinjiang Uighur Autonomous Region, China September 4, 2018. In Yining, police set up roadblocks hastily as Reuters reporters approached the site of the centre. Picture taken September 4, 2018. To match Special Report MUSLIMS-CAMPS/CHINA REUTERS/Thomas Peter 

A building of what is officially called a vocational skills education centre is photographed in Hotan in Xinjiang Uighur Autonomous Region, China September 7, 2018. Picture taken September 7, 2018. To match Special Report MUSLIMS-CAMPS/CHINA REUTERS/Thomas Peter 

Armed Chinese police officers control a checkpoint near what is officially called a vocational education centre in Yining in Xinjiang Uighur Autonomous Region, China September 4, 2018. Picture taken September 4, 2018. To match Special Report MUSLIMS-CAMPS/CHINA REUTERS/Thomas Peter 

A gate of what is officially known as a vocational skills education centre is photographed in Dabancheng, in Xinjiang Uighur Autonomous Region, China September 4, 2018. This centre, situated between regional capital Urumqi and tourist spot Turpan, is among the largest known ones, and was still undergoing extensive construction and expansion at the time the photo was taken. Police in Dabancheng detained two Reuters journalists for more than four hours after the photos were taken. Picture taken September 4, 2018. To match Special Report MUSLIMS-CAMPS/CHINA REUTERS/Thomas Peter 

Security guards stand at the gates of what is officially known as a vocational skills education centre in Huocheng County in Xinjiang Uighur Autonomous Region, China September 3, 2018. At this vocational skills education centre near the Kazakhstan border, the high perimeter fences have been adorned with red propaganda banners. The entrance, pictured, is adorned with Chinese flags and features giant prints of Chinese landmarks and motifs as well as Communist Party slogans. Picture taken September 3, 2018. To match Special Report MUSLIMS-CAMPS/CHINA REUTERS/Thomas Peter 

With XinjiangÕs fabled Tianshan mountains in the background, what is officially known as a vocational skills education centre is seen in Turpan in Xinjiang Uighur Autonomous Region, China September 5, 2018. The centre is marked out clearly by the white perimeter fence and the guard towers in each of its corners. Picture taken September 5, 2018. To match Special Report MUSLIMS-CAMPS/CHINA REUTERS/Thomas Peter 

Workers walk by the perimeter fence of what is officially known as a vocational skills education centre in Dabancheng in Xinjiang Uighur Autonomous Region, China September 4, 2018. This centre, situated between regional capital Urumqi and tourist spot Turpan, is among the largest known ones, and was still undergoing extensive construction and expansion at the time the photo was taken. Picture taken September 4, 2018. To match Special Report MUSLIMS-CAMPS/CHINA REUTERS/Thomas Peter 

The entrance of what is officially known as a vocational skills education centre is photographed in Dabancheng in Xinjiang Uighur Autonomous Region, China September 4, 2018. This centre, situated between regional capital Urumqi and tourist spot Turpan, is among the largest known ones, and was still undergoing extensive construction and expansion at the time the photo was taken. Picture taken September 4, 2018. To match Special Report MUSLIMS-CAMPS/CHINA REUTERS/Thomas Peter 

A perimeter fence is constructed around what is officially known as a vocational skills education centre in Dabancheng in Xinjiang Uighur Autonomous Region, China September 4, 2018. This centre, situated between regional capital Urumqi and tourist spot Turpan, is among the largest known ones, and was still undergoing extensive construction and expansion at the time the photo was taken. Police in Dabancheng detained two Reuters journalists for more than four hours after the photos were taken. Picture taken September 4, 2018. To match Special Report MUSLIMS-CAMPS/CHINA REUTERS/Thomas Peter 

An armed police officer stands guard outside the entrance of what is officially called a vocational skills education centre in Hotan in Xinjiang Uighur Autonomous Region, China September 7, 2018. Picture taken September 7, 2018. To match Special Report MUSLIMS-CAMPS/CHINA REUTERS/Thomas Peter 

Security cameras are installed above the perimeter fence of what is officially known as a vocational skills education centre in Dabancheng, in Xinjiang Uighur Autonomous Region, China September 4, 2018. This centre, situated between regional capital Urumqi and tourist spot Turpan, is among the largest known ones, and was still undergoing extensive construction and expansion at the time the photo was taken. Picture taken September 4, 2018. To match Special Report MUSLIMS-CAMPS/CHINA REUTERS/Thomas Peter 

A guard watchtower rises along a perimeter fence of what is officially known as a vocational skills education centre in Dabancheng in Xinjiang Uighur Autonomous Region, China September 4, 2018. This centre, situated between regional capital Urumqi and tourist spot Turpan, is among the largest known ones, and was still undergoing extensive construction and expansion at the time the photo was taken. Picture taken September 4, 2018. To match Special Report MUSLIMS-CAMPS/CHINA REUTERS/Thomas Peter TPX IMAGES OF THE DAY 

Workers walk by the perimeter fence of what is officially known as a vocational skills education centre in Dabancheng in Xinjiang Uighur Autonomous Region, China September 4, 2018. This centre, situated between regional capital Urumqi and tourist spot Turpan, is among the largest known ones, and was still undergoing extensive construction and expansion at the time the photo was taken. Picture taken September 4, 2018. To match Special Report MUSLIMS-CAMPS/CHINA REUTERS/Thomas Peter 

A worker walks by the perimeter fence of what is officially known as a vocational skills education centre in Dabancheng, in Xinjiang Uighur Autonomous Region, China September 4, 2018. This centre, situated between regional capital Urumqi and tourist spot Turpan, is among the largest known ones, and was still undergoing extensive construction and expansion at the time the photo was taken. Picture taken September 4, 2018. To match Special Report MUSLIMS-CAMPS/CHINA REUTERS/Thomas Peter 

Security guards stand at the gates of what is officially known as a vocational skills education centre in Huocheng County in Xinjiang Uighur Autonomous Region, China September 3, 2018. At this vocational skills education centre near the Kazakhstan border, the high perimeter fences have been adorned with red propaganda banners. The entrance, pictured, is adorned with Chinese flags and features giant prints of Chinese landmarks and motifs as well as Communist Party slogans. Picture taken September 3, 2018. To match Special Report MUSLIMS-CAMPS/CHINA REUTERS/Thomas Peter 

Workers ride past the perimeter fence of what is officially known as a vocational skills education centre in Dabancheng, in Xinjiang Uighur Autonomous Region, China September 4, 2018. This centre, situated between regional capital Urumqi and tourist spot Turpan, is among the largest known ones, and was still undergoing extensive construction and expansion at the time the photo was taken. Picture taken September 4, 2018. To match Special Report MUSLIMS-CAMPS/CHINA REUTERS/Thomas Peter 

Chinese police officers are photographed securing the road near what is officially called a vocational education centre in Yining in Xinjiang Uighur Autonomous Region, China September 4, 2018. Picture taken September 4, 2018. To match Special Report MUSLIMS-CAMPS/CHINA REUTERS/Thomas Peter