Introduction to Zhenwu Hall: Zhenwu Hall is the main building of Qinglong Temple, with an all-wood structure. The hall is dedicated to the Taoist commander "Xuan Tianwu Arctic Emperor" who guards the north. This hall was originally the Qin'an Hall of Emperor Chongzhen's palace. Lin Qingde changed the palace into a Taoist temple, compared Zhenwu to the incarnation of Chongzhen, and changed the palace to Zhenwu Hall.