Introduction to Xuanyuan Cave: Xuanyuan Cave, also known as the "Eight Immortals Cave", is a place where ancient people went into retreat to seek their own liberation. The entrance of the cave faces southeast and is hand-carved from a lying pot-bottom-shaped granite. Three immortals are engraved on the front of the entrance. They are all one and a half feet tall. They sit cross-legged, with big ears and shoulders, smiling and with different gestures. There are three on the left wall and two on the right. Among them are three men and two women. The man has both hands. Perpendicular to the lower Dantian, the female figure is standing with her hands clasped, and the height is the same as that of the seated figure. The different postures of the stone sculpture reflect the qigong culture of the Liao and Jin dynasties. There is a stone trough in the cave. Rainwater flows into the cave along the stone trough, forming an "S" shape and then flows out, which can purify the air and isolate rainwater erosion.