Songbai Evergreen Introduction: In Sanyuan Cave, there are many inscriptions on the cliffs, as well as many original plaques and couplets. The couplet written by Li Changzhi, a county resident, goes: "The high pavilion is at the end of the forest. After sitting for a long time, I gradually realize that everything is quiet; the sunset is bright and the birds are outside, but I can see everyone in a low position." It can describe the interest of this place.