Introduction to Laojun Cave: Laojun Cave Taoist Temple, formerly known as Tushan Ancient Cave, is located in Laojun Mountain in Tushan Mountains, Nan'an District. Laojun Cave was first built in the Han Dynasty and the Three Kingdoms period, and was officially founded in the late Sui and early Tang Dynasties. It was originally the Buddhist temple "Guanghua Temple". In the ninth year of Wanli in the Ming Dynasty (1581), in order to respect Li Laojun, the founder of Taoism, it was exchanged with the Tushan Temple of Dayu Temple and turned into a Taoist temple, named "Taiji Palace". It once became the Taoist Temple of Tianshi.