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.