National Highway 315 (or G315) is the main route leading to Mang Nhai, also considered the “loneliest national highway” in China, passing through the Gobi Desert and desolate lands, where the sound of birds sing. It is also a luxury.

However, the scenery along the way is so beautiful that it makes the traveler feel as if they have entered another world, vague and unreal.

In the photo is a section of Highway 315 passing through a dry valley, in the middle there is a dry river, both banks have a strange dark red color, because thousands of years ago, the geology of the river bed accumulated a lot of sulfur .