《元史·列传·卷七十一》
其简要内容是：世祖以上都为避暑之地，车驾前往，每年如常，宫内有大安阁、鸿禧殿和睿思殿，可以保养皇上的圣体，适宜于起居，对祖宗怀敬畏之心情。
其略曰： 世祖以上都为清暑之地，车驾行幸，岁以为常，阁有大安，殿有鸿禧、睿思，所以保养圣躬，适起居之宜，存畏敬之心也。
The brief content is: Shizu regarded Shangdu as a summer resort. It is normal for the imperial car to go every year. In the palace, there are Daguan Pavilion, Hongxi Hall, and Ruisi Hall. These halls can maintain the sacred body of the Emperor and are suitable for living, to express awe to the ancestors.