Introduction to the Longyin Gorge Plank Road: Walk up from Jinhuatuo to Longyin Gorge. The two mountains are facing each other, very close to each other, and the stream below is deep and the water is fast. On the deep stream is the Longyin Gorge plank road, with twists and turns and snakes running along it. The plank road uses huge rocks at the bottom of the ditch as pillars. The beams are connected by rolled logs, and wooden boards are laid on them. Some places on the plank road are also made of cement to look like logs. They have been covered with moss, making it difficult to tell whether they are genuine or not. The most important thing about the scenery of Qingcheng Mountain is that it is natural. It is randomly scattered and has no need for carving. Even if there is a little artificial, the traces of axe and chiseling are minimized. Human ingenuity cannot be compared with the great wisdom of nature.