Ask about the introduction of the auditorium: Between Chengdemen and Daxiaomen, there used to be separate courtyards, but later the building collapsed and now only the foundation of the hall remains. The Wenli Hall was originally located in the East Cross Courtyard. Today, on the foundation of the hall, there is still a stone tablet "Praise to the Wenli Hall" written by Emperor Qianlong of the Qing Dynasty.