Jiangsu Yancheng Red-crowned Crane Nature Reserve is located in the eastern coastal beach, with a total area of 36 million mu and a core area of about 50,000 mu. There are 0 reed natural vegetation, rich coastal life, lonely and quiet, and it is an ideal habitat for birds. Every year, there are only 6yy red-crowned cranes and thousands of geese and ducks, which are national first-class rare birds that come here to winter, flying in the dark, which is very spectacular.

So choose: C.