A wild yak is seen in the Altun Mountains National Nature Reserve in northwest China's Xinjiang Uygur Autonomous Region, April 2, 2018. (Xinhua/Jiang Wenyao)
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A wild yak is seen in the Altun Mountains National Nature Reserve in northwest China's Xinjiang Uygur Autonomous Region, April 2, 2018. (Xinhua/Jiang Wenyao)
