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
Black-headed gulls fly over the Yange Lake in Yinchuan, capital of northwest China's Ningxia Hui Autonomous Region, March 21, 2019. (Xinhua/Feng Kaihua)
Black-headed gulls fly over the Yange Lake in Yinchuan, capital of northwest China's Ningxia Hui Autonomous Region, March 21, 2019. (Xinhua/Feng Kaihua)