According to legend, there was a master in the mountains with two apprentices practicing in the mountains. One day, the younger brother and the brothers brag that he would make trouble, and the brothers certainly did not believe. The younger brother took the brother to the cave. The younger brother stood near the entrance of the cave. He saw that he was more than three feet away from the ground in a short while. After a while, he slowly fell back to the ground; the brothers were shocked. After the event, the brothers told the master about this strange thing. The master did not believe the apprentice. After observing, he knew that there was a giant clam in this hole. He had already cultivated into a fine, and when he exhaled, he stood in the hole. Tengyun drives the fog, and when it changes, the people at the hole will slowly fall back. The master said to the disciples: "Fortunately, the giant python has not yet cultivated into a fine, otherwise your life is difficult to protect!" After a few years, the giant python became a fairy, so this place has also become a master and a trio. The place, this place is also called "Imperial Cave" by future generations.