Introduction to Mudong Cave: It is located on Mudao Island, 300 meters away from Tiangong Cave, covering an area of ​​about 5,000 square meters. It is composed of three sub-caves and has an ancient and quiet beauty. The outside of the cave is a large basin, and inside it seems to be a splendid song and dance venue that combines painting and architectural art. There are colorful, majestic, exquisite and soft stones in the middle and inner rooms of the cave. Under the illumination of the light, the stone milk suddenly shone and reflected a diamond-like brilliance.