Introduction to the Jiaotai Hall: In the Qing Dynasty, the Jiaotai Hall was the place where the queen received congratulations from ministers on festivals such as New Year's Day and Qianqiu (the queen's birthday). Later, the 25 square seals used by the emperor to exercise power were stored here. In addition, there are copper pot dripping devices and self-ringing bells made in the Qing Dynasty.