Wintering whooper swans are seen at the Yellow River in Hualong Hui Autonomous County of Haidong City, northwest China s Qinghai Province, Dec. 23, 2022.Wintering whooper swans are seen at the Yellow River in Hualong Hui Autonomous County of Haidong City, northwest China s Qinghai Province, Dec. 23, 2022. (Xinhua/Wu Gang)