Introduction to the concave waterfall: The concave waterfall is located to the west of Erjiu, bypassing the ridge, and a sudden explosion appears in front of you. The waterfall forms a concave shape, from which the waterfall jumps, falls, and then jumps and continues to fall. It is named the concave waterfall. There is a ridge next to it. In the recess of the ridge, 102 stone steps go straight into the clouds, which is called Bu Yunling. Stepping up to Yunling, there is a rock that looks like Sha Monk, named Sha Monk Rock.