Istanbul: Writer and poet Abduweli Ayup teaches Uighur songs to a group of children in a school in Istanbul.
Many of these children at the Hira Language Centre don't live with their parents anymore since they were arrested after going back to Xinjiang to visit relatives.
Thousands of members of this predominantly Muslim Turkic ethnic group have found shelter in Turkey after fleeing a crackdown by the Chinese regime.
Teaching his mother language is a passion and a mission for Ayup, a 46 year-old Uighur linguist who was detained and tortured for fifteen months in 2014 by the Chinese authorities.
Uighur is protected by China's constitution as one of the official languages, together with Chinese Mandarin, in the western autonomous region where Uighurs have lived for centuries.
However, Ayup was detained, interrogated and tortured after teaching and creating a network of kindergartens for Uighur children to learn their mother language.
The American-educated linguistic immediately wrote three books about his 15 months of detention soon after he fled to Turkey with his wife and two daughters in August 2015.
He proudly shows his entire works on Uighur identity, politics and language inside Hira's Uighur bookstore in Kucukcekmece, a neighbourhood in Istanbul where many members of this minority have settled and opened businesses.
The poet from Kashgar knew that at some point he would be detained, interrogated and tortured because of his educational activities, but he never expected to be sexually abused by his cellmates.
"Torture is a part of the interrogation, so I didn't expect them to respect me and treat me as a normal man. But I didn't expect they would do those kind of evil things to me. The first night those three guards ordered about twenty criminals, prisoners, surrounded me and abused me," explains Ayup.
The detention centre where he was held turned into a so-called re education camp two years ago.
Chinese authorities call the heavily-guarded internment camps for Muslim minorities in the far west Xinjiang region, allegedly aimed at erasing radicalisation, "vocational training centres".
According to human rights groups and researchers, around one million individuals from the predominantly Muslim Uighur and Kazakh ethnic groups are held in a network of compounds spread throughout the region.
Former inmates like Ayup describe a ban on religious activities, harsh conditions, political indoctrination and psychological and physical torture.
Activists say the aim of Beijing is to assimilate these groups and other minorities, including Tibetans, with the massive Han Chinese majority.
However, China maintains that current measures are necessary for combating latent religious extremism and terrorism.
In March, following international criticism against these camps, Chinese authorities claimed that these centres will gradually disappear.
The camps in the far west Xinjiang region have elicited an international outcry following Ayup's and other former prisoners' testimonies, to the point that Chinese authorities released a video in February of singer Abdurehim Heyit, imprisoned since 2017, after some reports claimed he died in prison.