Swans fly over the Swan Lake. [PHOTO BY WANG JING/CHINA DAILY]

To keep things pristine, every year the conservation department of Swan Lake disinfects the areas surrounding Swan Lake. And the staff also regularly collect swan feces to check on the health of the birds.

When the lake is frozen, the staff puts food on the surface of the lake.

Rongcheng and the Ocean University of China jointly completed the restoration of eelgrass in the area, and have launched a number of other projects such as the restoration of Lanhe Wetland and the restoration of the north coast of Rongcheng Bay.