Jiuxian cave is full of old pines. Under the pines, the old man with white beard talks and laughs. In Taoist mythology, pine is often the symbol of immortality, and it is the channel to ascend to heaven. In the song and Yuan Dynasties, Zhao Daoyi recorded the legend that Hou Daohua rose from the pine tree. When he rose, "there were clouds and cranes circling on the pine tree, the Xiao Sheng was loud, and Daohua flew suddenly to the top of the pine tree and sat down in the air Zheng yunsou, a later generation, wrote a poem with this title: "leave the clothes on the top of the pines and go to the jade sky to pass on the holy trace forever. I don't know if I bow to all the immortals? I'm tired. Now it's two nights apart. "