Introduction to Tianshi Cave: Tianshi Cave is located halfway up Qingcheng Mountain. It was originally named Yanqing Temple and was first built during the Daye Period of Sui Dynasty (605-618). After the temple, Tianshi Cave is said to be Zhang Daoling’s training place, also known as Gu Chang Taoist temple. The main buildings include the Mountain Gate, Qinglong Hall, White Tiger Hall, Sanqing Hall, Ancient Huangdi Temple, Three Emperors Hall, Tianshi Cave Mansion, etc. It is the largest palace in Qingcheng Mountain, and is also the national key Taoist temple and the seat of the Qingcheng Mountain Taoist Association.