Introduction to Danbo Jingcheng Hall: To the north of Lizhengmen is the main hall of the Summer Resort. This hall is large in scale, with the Outer and Inner Meridian Gates, the Chao Fang, and the Pavilion in front of the hall, and there are the Sizhi Library, the Bedroom, and other buildings in the back. There is a plaque with the words "Danbo Jingcheng" written by Emperor Kangxi hanging in the hall. This hall collects more than 10,000 volumes of ancient and modern books, compiled during the Kangxi and Yongzheng years, covering astronomy, geography, society, philosophy, art, aesthetics and ethics. The main hall is built on a marble platform. It is a mountain-style building with blue bricks, tiles, and rolling sheds. It is simple, elegant, and solemn.