Introduction to Chengxiantai: In the Yunguang Cave Scenic Area, there is a square stone platform with three characters "Chengxiantai" engraved on it. It is said that Zhang Guolao also became a monk here. Tieguai Li traveled all over the world to visit him, and then he stepped on an immortal stone and jumped three thousand meters straight to Penglai Immortal Pavilion. Although this is just a legend, the scenery here is pleasant and it is indeed an ideal place for sightseeing.