Be sure to choose when it rains. It didn't rain at this stage that we went yesterday. The "world's first waterfall" is like a small stream with little water flow, without the momentum of falling down to Longtan, a valley 197 meters deep. Fortunately, the rocks are good; it's even better to have a guide with vivid explanations. Not into the scenic area, like crocodiles open their mouths to the sky; into the gate of the scenic area, like the scissors in the gardener's hands; along the way, like woodpeckers; then, like a silly bear stealing honey from a honey can, unfortunately, the pot is leaking; then down, like a straight mast; finally, a sail sailing - changing scenery, magic. Admire nature's ghost axe magic. In addition to this, there is another, Yandang Mountain. World Geopark, with my big Wuxi Jiangyin Xu Xiake has a thousand and one links. Geological phenomena, such as spherical rhyolite, rhyolite dome and volcanic passage, have increased a lot of knowledge.