Introduction to Taixu Cave: Taixu Cave is located on the mountainside of the main peak of Songfeng Mountain. It is commonly known as "Chuanxin Cave". Xiao Baozhen, a Taoist from the Jin Dynasty, once practiced in the cave. The cave was originally a larger natural rock cave, but was later artificially dug into a rock cave through the mountain. The cave is 17.5 meters long, 2.64 meters high, and 3.27 meters wide. The front entrance is slightly larger, and the inside of the cave is slightly curved in an "S" shape. There were originally four stone steles in the cave, one of which was a stele for Taoist Cao, now stored in the Taoist Museum of the Jin Dynasty; the other was a stone stele published in the Qing Dynasty describing the history of Haiyunguan, which was lost during the "Cultural Revolution"; the remaining two were The "Eternal Immortality" stele erected during the period of the Republic of China and the "Eternal Immortality" stele erected during the Japanese and Puppet period are still in the cave.