Introduction to Taihu Stones: There are three unique Taihu stones standing in the northeast of the pavilion, which are the treasures of Yiyuan Town. The stone is engraved with the four seal characters "Screen Threefold", and underneath there is a paragraph that says: "The old man in the valley inscribed a stone saying". "Valley" refers to the Song Dynasty poet Huang Tingjian, who called himself Valley Taoist.