Swans play as snow falls in Yandunjiao Swan Lake after a snowfall in Rongcheng, east China's Shandong Province, Feb. 16, 2016. The Swan Lake is a major part of the Rongcheng Nature Reserve for Whooper Swans and a nest for thousands of migratory swans from Siberia to spend winter. [China.org.cn/Photo by Han Jiajun]