Polygala Bridge introduction: Polygala is the name of a Chinese herbal medicine. The word also means lofty ambition. From here, you have to climb up the steps to see the scenery of Wolong River. The stone carving "Orioles Cry" at the head of the bridge is a metaphor for the oriole's crow in the Wolong River mountain spring. It can also be regarded as the "Crying Oriole". The singing oriole accompanies tourists while climbing, creating a blend of scenes.