Jiulaodong is located under Jiulao Peak, next to Heilongtan. The mouth of the cave is in the shape of "human". It is about 1500 meters long and about 4 meters high. The height difference between the mouth and the bottom of the cave is 84 meters. It is the largest natural cave in Mount Emei. The full name is Jiulao Xianrendong. It is rumored to be the Dongfu of the Xianren party.