ISTANBUL — In quiet, polite voices, Aysu and Lütfullah Kuçar describe the nearly 20 months they spent in state boarding schools in China’s western region of Xinjiang, forcibly separated from their family.
Under the watchful gaze of their father, the two ethnically Uyghur children say that their heads were shaved and that class monitors and teachers frequently hit them, locked them in dark rooms and forced them to hold stress positions as punishment for perceived transgressions.
By the time they were able to return home to Turkey in December 2019,…