Introduction to the lower layer: The lower cave is a modern underground river corridor. It is generally spread out in a multi-level zigzag shape. There are secret visits to local officials, immortals clearing the way, Shenzhou going straight up, Jiuqu Tianguan, Milky Way Westward Flow, Replaying Glory, and Luo Cave. Attractions such as the girl waving her hand and the ever-flowing stream.