Ice storage room introduction: There is a pavilion-like side room on the south side of the eastern section of the south corridor, which is called the ice storage room. A deep square pit is dug in the middle of the room, with a side length of 2.55 meters and a depth of 1.8 meters. The mouth of the pit is made of mortise and tenon joints. The structure is surrounded by stone slabs. From the north of the east wall of this side room, there is a slope passage to go around and enter the ice storage room.