The Yinshan Mountain, located in the western part of Inner Mongolia, was the hub of Chinese northern nomadic culture in history. Not only has it witnessed the rise and fall of different ancient nomadic groups, but it reserved the trace of their living with their petroglyphs created through 10 historical stages. Among 50,000 paintings which have been found so far, the earliest one can be dated back to 10,000 years ago. The long history and rich content made it a valuable source for historical study. However, due to vandalism, natural erosion and a lack of continued protection, a lot of paintings are in peril.