FILE - Security officers in protective suits stand at a reception area at the visitors' hall at the Urumqi No. 3 Detention Center in Dabancheng in western China's Xinjiang Uyghur Autonomous Region, on April 23, 2021. Urumqi No. 3, China's largest detention center, is twice the size of Vatican City and has room for at least 10,000 inmates. (AP Photo/Mark Schiefelbein, File)