In the third year of Jin Tiande (1 15 1), Wan Yanliang, the king of Hailing, moved the capital to Yanjing and changed it to "Zhongdu". Jinzhongdu was expanded on the basis of Nanjing City in Liao Dynasty. According to the regulations of Bianjing City in Northern Song Dynasty, it was expanded on three sides, east, west and south, slightly square. Zhongdu Imperial City was expanded on the basis of Nanjing (Yanjing), Liaoning Province. The site of Da 'an Hall in Jinzhongdu is located under the memorial pavilion of Jinzhongdu Palace on Binhe Road in Guang 'anmen.

Jin Zhongdu Imperial City has four gates, namely Chen Zhenmen in the north, Xuanhua Gate in the east, yingtianmen in the south and Yuhua Gate in the west. The West Lake (now the Lotus Pond in Xicheng District, Beijing) was built in the imperial city for the emperor to visit. The palace in Jinzhongdu is very beautiful because it transplanted the essence of Bianjing Palace in the Northern Song Dynasty to the north. The architectural layout of the Imperial City in Jinzhongdu directly influenced the pattern of the imperial city in the Yuan, Ming and Qing Dynasties, such as the "Thousand Steps Gallery" built in front of the imperial city and the "Thousand Steps Gallery" built in front of the imperial city in the Yuan and Qing Dynasties in Beijing. In fact, the construction of the imperial city in Jinzhongdu is a precedent for the construction of the imperial city in the Yuan Dynasty and the Ming and Qing Dynasties, which has played a role in connecting the past with the future. As for the palace, it seems that the two main halls are called Da 'an Hall (equivalent to the Hall of Supreme Harmony in the Forbidden City) and Fu 'an Hall (equivalent to the Baohe Hall in the Forbidden City). Is the landlord satisfied?