Introduction to Wanniao Island: Youdao is located in the east-central part of the Changdao Islands, also known as Wanniao Island. It has an altitude of 73.5 meters, a coastline of 1.25 kilometers long, and an island land area of ​​only 0.044 square kilometers. Cheyoudao is small and exquisite. From a distance, it looks like a finely carved gold seal. It was called "Emperor's Treasure" in ancient times. When we get closer, we can see the steep cliffs of the island. These cleaved cliffs are mostly made of quartzite and pole rocks, which are extremely easy to break. After weathering and sea erosion, the cliffs have become pitted with pits, stone steps, stone platforms, grottoes, etc. The stone caves are connected to each other to form a natural "stone building" for seagulls to rest on. It is covered with bird fat and is as white as snow. This is evidence that seagulls have been breeding here for generations.