Migrant birds fly over the Hailiu reservoir in Tumd Left Banner in Hohhot, north China's Inner Mongolia Autonomous Region, March 9, 2020. (Xinhua/Lian Zhen)
Migrant birds fly over the Hailiu reservoir in Tumd Left Banner in Hohhot, north China's Inner Mongolia Autonomous Region, March 9, 2020. (Xinhua/Lian Zhen)