Migratory birds winter in north China grassland

Photo taken on Jan. 10, 2021 shows swarms of swan geese roosting and foraging in Wulate Middle Banner, north China's Inner Mongolia Autonomous Region. Flocks of migratory birds such as swan geese and ruddy shelduck have come to the grasslands of Uiad, north China's Inner Mongolia Autonomous Region, to spend the winter. (Xinhua/Li Yunping)