Police officers stand at the outer entrance of 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)
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