Introduction to the plank road: The plank road is winding and winding, built on a steep cliff. Looking down from the top of the mountain, it looks like a giant dragon meandering forward between the cliffs, with the potential of nine twists and turns. As tourists climb up the stairs, they are greeted by green bamboos and lush green trees on both sides, creating a beautiful and colorful scenery. If you look down the cliff, you will see an abyss and cliffs in front of you, which is frightening.