Introduction to Lingyun Plank Road: The ancient plank road on Danya cliff was opened by Zhuge Liang during his southern expedition during the Three Kingdoms period. It has a total length of 12 kilometers and a width of less than 1 meter. It follows the shape of the mountain and winds. You can see waterfalls and springs when you look up, and you can see the canyon and the sea of ​​bamboo when you look down.