Introduction to the Immortality Altar: Built in the Qing Dynasty, it is a place for praying for immortality. In front of the altar is "The Best Cave in the World" written by Xu Youren, a scholar of the Yuan Dynasty. The Polygonum multiflorum growing in the high platform and the cypress trees growing horizontally both represent the meaning of longevity. The forest of steles in front of the Changsheng Pavilion contains dozens of stone inscriptions from the Tang, Song, Yuan, Ming and Qing dynasties. Among them, the record of the founding of the stone bridge in the Dading period of the Jin Dynasty has strong calligraphy and its rubbings have been exhibited abroad. The great calligrapher Zhao Mengfu of the Yuan Dynasty wrote the "Stele of Tou Long Jian Ji", which is praised by the world for its vigorous and graceful writing.