Introduction to Jiuzhou Qingyan: Jiuzhou Qingyan is located to the north of the Zhengda Guangming Hall and is the imperial palace. It is composed of several small islands around the back lake of the New Yuanming Garden, forming an extremely beautiful shell pattern. Each island has beautiful and moving scenery. The largest island is the Jiuzhou Qingyan Hall, which consists of three main halls, all facing south. The first entrance is the Yuanming Xinyuan Palace, and the middle one is the Fengsan Selfless and Fengsan Halls. The northernmost one is Jiuzhou Qingyan Hall. Both Yongzheng and Daoguang died in Qingyan, Jiuzhou. In the 16th year of Daoguang, the Old Summer Palace, Fengsan Selfless Hall, and Jiuzhou Qinghun Hall were burned at the same time, and were later rebuilt.