Introduction to the Turtle and Snake Stele: In the 13th year of the Yuan Dynasty and the Ming Dynasty (1448), the standing stone was re-engraved. There are two existing connections, one in the south nunnery and one in the north cave. The two big characters are each half a meter square, and the two characters are like turtles crawling like turtles. The snake character is winding and vivid. It can be said that it is a stroke of genius! It was written by Tan Zhenjun, a famous Taoist priest in the Yuan Dynasty. Those in Nan'an are engraved on the underside of the stele "Ode to the Immortal Person Given by Emperor Taizong of the Tang Dynasty".