Introduction to Ciqing Hall: Built in the sixth year of Emperor Tongzhi (1867), it has 10 rooms on the front and 4 rooms on the side. There is Qingyan Tower in the east and Xieqing Hall in the west, which are connected to each other. There is a red brick wall behind Ciqing Hall called the "Ten Immortals Chimney" with "Ten Immortals" carved on the wall. The top of the wall is crowned with 10 house-shaped chimney caps to facilitate smoke exhaust. The Jujangsaeng Chimney is considered the most beautiful chimney in the Joseon Dynasty and is currently designated as Precious Cultural Property No. 810. At the back of the narrow hall, the wall doubles as a chimney and is carved with gorgeous patterns. In this way, the wall, garden and chimney are integrated into one, showing the wisdom and craftsmanship of the craftsman.