Introduction to Yunguang Cave: It is gourd-shaped, with a mouth height of five meters, an interior height of nine meters, and a depth of more than thirty meters. There are stone dragons, stone tigers, stone toads, stone wood fish, stone longevity stars, and stone Dingfeng inside. The eight stone scenes of beads, stone fairy bed, and stone lotus basin are all natural and lifelike. They are called "Babao", so it is also called "Babao Yunguang Cave". On the rock at the entrance of the cave is engraved "Nine-top Iron Temple Mountain, Babao" "Yunguangdong" cross.
"The Romance of the Gods" once gave a detailed and vivid description of Yunguang Cave. According to historical records, during the Dading period of the Jin Dynasty, Wang Chongyang came east to teach disciples and founded the Quanzhen Sect of Chinese Taoism. King Chuyi of Dongmou, named Yuyang, went to Yanxia Cave in Kunyu Mountain to worship Wang Chongyang as his teacher and practice Taoism. After completing his studies, Wang Yuyang traveled east to Chashan Mountain and came to Yunguang Cave, where he continued to study Quanzhen Taoism and founded the Kunshan School of Quanzhen Sect. The famous "Yunguang Collection" was written in Yunguang Cave.