Introduction to Dagaoxuan Hall: Also known as Dagao Hall or Dagaoyuan Hall, it is a Taoist temple used by the royal family in the Ming and Qing dynasties. The entire temple covers an area of ​​approximately 13,000 square meters, with a total construction area of ​​approximately 5,300 square meters. The palace includes the Dagaoxuan Gate, the Bell and Drum Tower, the East and West Side Halls, the Dagaoxuan Hall, the Jiutian Yingyuan Lei Altar, the veranda hall, and the Qianyuan Pavilion, a two-story pavilion that symbolizes the round sky and the square place.