Introduction to coastal wetlands: Ximen Island is located at the northernmost end of Yueqing Bay, covering an area of 6.976 square kilometers. It is adjacent to the famous scenic spot Yandang Mountain and is a continental edge island where the Yandang Mountains extend eastward and sink into the sea. The mangrove wetlands on the island grow in the sea, and people paddle boats leisurely through the trees. The scenery is extraordinary.