Introduction to the welcoming hall: The area is about 2,500 square meters, with an average height of about 30 meters. It is composed of Tianchi, main hall, and inner hall. There is a 60-square-meter oval pool in the cave. Water drips into the pool all year round from the top of the cave, making a ding-dong sound. There is rhyme. There is a two or three meter high stone pillar in the center of the hall, which is dark green in color. At first glance, it looks like a pine tree with mottled spots. But from the front, it looks like a bust with a scarf on its head and blue and purple clothes.