The Yin Mountains, also known by several other names, are a mountain range stretching across about of northern China. They form the southeastern border of the Gobi Desert and cross the Chinese provinces of Inner Mongolia and Hebei. Among other things, the range is notable for its petroglyphs. Names The Yin Mountains are also known by their Chinese name as the Yinshan, which associates them with the great feminine principle of traditional Chinese philosophy. They are also known as the from the former name of nearby Chengde and its eponymous river and as the or Daqingshan. In Mongolian, they are known as the Dalan Qara, Dalan Terigün, Dalan Khar, Moni Agula, or Moni Uul. It was known as Čuγay quzï () in Old Turkic texts. Geography The range stretches for about . It begins in the southwest as the Lang Mountains at the northern loop of the Yellow River. It then rises to about above Linhe District, falls to a more modest north of Baynnur, and widens to a broad highland north of Baotou. Its eastern end is reckoned as about the area of Chengde. History Chinese historians record that the range was a stronghold of the Xiongnu ruler Modu Chanyu around 200BCE. The Yan, Qin, and Han border walls follow its southern ridges. The Tang poet Bai Juyi (772846) composed the "Yinshan Roads" about its paths. References . . Mountain ranges of China Mountain ranges of Inner Mongolia Mountains of Hebei Gobi Desert