Last October, Caohu National Wetland Park welcomed the first batch of wintering swans in 2021, and then hundreds of swans came to Caohu National Wetland Park to inhabit. The open water is their permanent habitat. In winter, they are the most flexible existence in Caohu National Wetland Park. In the twinkling of an eye, these wetland elves have lived here for six months. Recently, they have successively left Caohu National Wetland Park and safely went to spawning and breeding grounds.