These cliff paintings are located in western Inner Mongolia. They can be divided into four types: the oldest ones dated from the New Stone Age to the Bronze Age, or the period of the Xia, Shang and Zhou dynasties of the Central Plains; the second-oldest were executed by the Xiongnu nomads at a time equal to the period of the Eastern Zhou Dynasty to the Western Han Dynasty; the third-oldest betray Turkish characteristics of the time equal to the period of the Six Dynasties to the Tang Dynasty; and the most recent are relics of the Dangxiang and Mongolian tribes, and were executed over a period of time equal to that from the Song Dynasty to the Qing Dynasty.