![A herd of sheep graze on an island on Puma Yumco Lake, southwest China's Tibet Autonomous Region, Feb. 9, 2017. It is the coldest point of the year in Tibet, and time A herd of sheep graze on an island on Puma Yumco Lake, southwest China's Tibet Autonomous Region, Feb. 9, 2017. It is the coldest point of the year in Tibet, and time](https://c8.alamy.com/comp/HP5EA3/a-herd-of-sheep-graze-on-an-island-on-puma-yumco-lake-southwest-chinas-HP5EA3.jpg)
A herd of sheep graze on an island on Puma Yumco Lake, southwest China's Tibet Autonomous Region, Feb. 9, 2017. It is the coldest point of the year in Tibet, and time
![170218) -- LHASA, Feb. 18, 2017 (Xinhua) -- The Dowa village in Nakartse county is seen beside the frozen Puma Yumco Lake, southwest China's Tibet Autonomous Region, Feb. 9, 2017. It is 170218) -- LHASA, Feb. 18, 2017 (Xinhua) -- The Dowa village in Nakartse county is seen beside the frozen Puma Yumco Lake, southwest China's Tibet Autonomous Region, Feb. 9, 2017. It is](https://c8.alamy.com/comp/2ETFEF1/170218-lhasa-feb-18-2017-xinhua-the-dowa-village-in-nakartse-county-is-seen-beside-the-frozen-puma-yumco-lake-southwest-chinas-tibet-autonomous-region-feb-9-2017-it-is-the-coldest-point-of-the-year-in-tibet-and-time-for-the-annual-migration-of-herds-of-sheep-across-an-icy-lake-a-dangerous-and-exhilarating-ancient-practice-at-dowa-village-5070-meters-above-sea-level-thousands-of-sheep-were-taken-across-frozen-water-to-two-islands-on-puma-yumco-lake-one-of-the-worlds-highest-lakes-the-migration-started-before-dawn-hundreds-of-sheep-move-forward-one-after-another-an-2ETFEF1.jpg)
170218) -- LHASA, Feb. 18, 2017 (Xinhua) -- The Dowa village in Nakartse county is seen beside the frozen Puma Yumco Lake, southwest China's Tibet Autonomous Region, Feb. 9, 2017. It is
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