Wild swans roam the snowfield at the Yellow River Wetland in Yuncheng, north China's Shanxi Province, Jan. 5, 2018. The Swan Lake on Thursday witnessed this winter's first snowfall. (Xinhua/Liu Wenli)
Wild swans roam the snowfield at the Yellow River Wetland in Yuncheng, north China's Shanxi Province, Jan. 5, 2018. The Swan Lake on Thursday witnessed this winter's first snowfall. (Xinhua/Liu Wenli)
