Introduction to Zhengxia Hall: According to literature inference, it was built by Fan Cheng of the Song Dynasty, and its site is suspected to be at the western foot of Fubo Mountain. Near the water of Huanzhu Cave in Fubo Mountain, there are cliff stone carvings with three official script characters of "Zhengxia Hall" written by Du Yishu of Suiyang and Fan Chengdali of Wujun. They are one of the finest carvings of the Song Dynasty. Du Yi had a good relationship with Fan and was good at calligraphy. Fan Chengda's "Deer Ming Banquet Poems" has a postscript that says "Grow Gui in Zhengxia and enter the Second Hall of Virtue". Fan Jianzheng's summer hall has a plaque written by Du Shu on it, and the cave wall is surrounded by water, which shows how precious it is. The ruined monuments in this hall still exist, which provide evidence of the archaeological architecture.