From the Hongwu Gate at the southern end of the imperial city to the imperial road in the middle of Chengtian Gate, there are five stone bridges named "Waiwulong Bridge". ".

On both sides of the imperial road between Hongwumen and Waiwulong Bridge is the central government office area of ​​the Ming Dynasty. hospital etc.

At this moment, in the Five Armies Governor's Mansion, Qiu Fu, Duke of Qi, Zhu Neng, Duke of Cheng, and Wang Ning, Marquis of Yongchun, the heavyweight supporters of the second prince Zhu Gaoxu, were sitting together.