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Wild birds look for food at the Barkol Lake in the Kazak Autonomous County of Barkol, northwest China's Xinjiang Uygur Autonomous Region. (Xinhua/Zhang Xiaocheng)

Wild birds look for food at the Barkol Lake in the Kazak Autonomous County of Barkol, northwest China's Xinjiang Uygur Autonomous Region. (Xinhua/Zhang Xiaocheng)