Introduction to the brick well of the Jin Dynasty: Discovered during the excavation of the Dabaotai Han Tomb in 1975, it is the only fully preserved brick well of the Jin Dynasty in Beijing. The diameter of the well head is 1.4 meters, the depth of the well is 8 meters, and the well wall is 17* Made of 5 cm blue bricks. A large number of Jin Dynasty cultural relics were unearthed in the well during the same period. According to "Analysis of Jin Zhi", the site here may be the summer resort of Jin Zhangzong's concubine Li.