Introduction to Yi Fengxuan: In "A Journey to Baizhang Mountain" written by Zhu Xi of the Song Dynasty, "In front of Yi Lu Mountain, there is a unique peak." There is a lake stone named "Duxiu Peak" in the west of this building, and the courtyard in front of the Xuan is called "Stone Forest Courtyard". There are Taihu stone peaks such as Wancui, Yinghui, Duan Jin, Jingshuang, etc. in the courtyard. The owner of the garden is obsessed with stones, so he borrowed Mi Fu to worship them. According to stone allusions, the pavilion is called Yi Feng Pavilion. The building is made of hard mountain, with two and a half rooms on the outside, but only one and a half rooms on the inside. It was named this way during the Liu family's time, and it is still used today.