ALTAY, April 21, 2016 -- Wild geese frolic for courtship in the Kekesu Wetland in Altay, northwest China's Xinjiang Uygur Autonomous Region, April 20, 2016. As the largest marsh-wetland in the northern part of Xinjiang, the Kekesu Wetland attracted a good many migratory birds to nest for breeding every year. (Xinhua/Zhang Wencheng)
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