Banbiandu Introduction: The giant wall along the river located on the southern bank of Xiangba Island on the Lijiang River is known for its three wonders. First, the stone wall is as steep as a knife, more than 50 meters high and about 200 meters long. It is majestic and extremely spectacular; Second, due to the huge wall blocking the river, there must be a transition on the same bank, forming a river with three piers on both sides, which is called a triangle crossing; third, the stone patterns on the cliff are mottled, like murals, and the vegetation between the stone gaps is like a magical work.