Chinese Mergansers, an endangered bird species, are pictured in Changbai Mountain National Nature Reserve in Northeast China's Jilin province, July 7, 2020. [Photo/Xinhua]
Chinese Mergansers, an endangered bird species, are pictured in Changbai Mountain National Nature Reserve in Northeast China's Jilin province, July 7, 2020. [Photo/Xinhua]
A Chinese Merganser, an endangered bird species, is pictured in Changbai Mountain National Nature Reserve in Northeast China's Jilin province, July 7, 2020. [Photo/Xinhua]