Introduction to the sleeping hall: The sleeping hall, also known as the middle hall, is the place where the emperor’s ancestors’ tablets are enshrined. Yellow glazed tiles on the roof of the veranda with single eaves. It is nine rooms wide (62.31 meters long) and four rooms deep (20.54 meters wide). The ancestral tablets in the hall are in the same hall and in different rooms. Each room is furnished with sacred chairs, incense tables, beds, mattresses, pillows and other items. The tablets are placed on the mattresses, symbolizing the ancestors' daily life and sleep.