Introduction to the Psychedelic Cave Hall: Ruijing Cave was developed in the late Cambrian striped dolomitic limestone 500 million years ago. The entrance of the cave faces south, and the cave body is divided into seven halls according to natural combinations. , generally 35-50 meters wide, 10-57 meters high, and the tunnel is 460 meters long. The total drop is 121.6 meters and the area is 16,900 square meters, which is rare among domestic caves. There are currently five cave halls open, and the first and second halls are the most luxurious.