Introduction to the Wall-hanging Highway: The Wall-hanging Highway is a road built inch by inch by the mountain people of Guidi Village in order to connect to the outside world. It took fourteen years of their lives to build it inch by inch. Five villagers sacrificed their lives for this. The so-called wall-hanging is to dig a hole along the cliff. For the convenience of construction and to obtain natural light after opening, the wall-hanging highway is mostly dug against the wall, with windows on one side opened more than ten meters apart. When viewed from a distance, this line of side windows outlines the outline of the road. Direction out of the tunnel. This section of the road is hundreds of meters from the top of the mountain and the bottom of the ditch, completely hanging on the mountainside. Looking from a distance, the 39 openings on the outside of the tunnel look like windows lined up in a row. The locals call it the "wall-hanging road". Wonders of the world.