A well-respected instructor who began teaching children Mandarin Chinese at the No. 24 Elementary School in the XUAR capital Urumqi in 1990, Sidik was forced to teach the language at a men’s camp known as Cang Fanggou between March and September 2017, as well as at a women’s camp at a former nursing home in the city’s Tugong district between September and October of that year. Sidik, who now lives in the Netherlands, estimates that the two camps held around 3,000 and 10,000 detainees, respectively.