Birds are seen in the Yellow River in Yongjing County, northwest China's Gansu Province, March 4, 2020. (Xinhua/Chen Bin)
Birds are seen in the Yellow River in Yongjing County, northwest China's Gansu Province, March 4, 2020. (Xinhua/Nie Jianjiang)
Birds are seen in the Yellow River in Yongjing County, northwest China's Gansu Province, March 4, 2020. (Xinhua/Nie Jianjiang)
Birds fly over the Yellow River in Yongjing County, northwest China's Gansu Province, March 4, 2020. (Xinhua/Chen Bin)
Birds fly over the Yellow River in Yongjing County, northwest China's Gansu Province, March 4, 2020. (Xinhua/Chen Bin)
A bird forages in the Yellow River in Yongjing County, northwest China's Gansu Province, March 4, 2020. (Xinhua/Chen Bin)
Birds fly over the Yellow River in Yongjing County, northwest China's Gansu Province, March 4, 2020. (Xinhua/Chen Bin)
Birds are seen in the Yellow River in Yongjing County, northwest China's Gansu Province, March 4, 2020. (Xinhua/Nie Jianjiang)
