Introduction to Zisun Stone: Zisun Stone is a natural stone behind Yishanfang and in front of the first mountain gate. The stone is 4 meters high, with strange convexities and concavities around it. The top is relatively flat, and there is a "Children's Hall" built on it. There are three characters "descendants stone" inscribed on the Yuan Dynasty stone in the recessed area on the sunny side, and the other three sides have stone inscriptions written by visitors from past dynasties.