Every winter, more than 100,000 tourists visit Rongcheng Swan Lake in Shandong province. [PHOTO BY WANG JING/CHINA DAILY]

Watching the swans, writing about them and painting them, besides taking photographs is now common and Rongcheng now annually enjoys a winter "swan tour" boom.

Now, in addition to the swans in Yandunjiao, Swan Lake, Sakura Lake, Sanggou Bay Urban Wetland Park and Shidao Bay, you can also see black-tailed gulls and other birds.

The swans are a part of everyday life in the city, and their images are everywhere - from small souvenirs, paper-cutouts, on stones, and there are many homestays that are themed on swans.

The presence of the swans is mainly due to the improved natural surroundings.