The Tian Shan meaning the Mountain of Heaven or the Heavenly Mountain, is a large system of mountain ranges located in Central Asia. The highest peak in the Tian Shan is Jengish Chokusu, 7439m.
The Chinese name for Tian Shan may have been derived from the Xiongnu word Qilian (, Xiao'erjing: ٿِ لِيًا) – according to Tang commentator Yan Shigu, Qilian is the Xiongnu word for sky or heaven. Sima Qian in the Records of the Grand Historian mentioned Qilian in relation to the homeland of the Yuezhi, and the term is believed to refer to the Tian Shan rather than the Qilian Mountains 1500km further east now known by this name. The Tannu-Ola mountains in Tuva (, Taᶇdь-Uula) has the same meaning in its name ("heaven/celestial mountains" or "god/spirit mountains"). Tian Shan is sacred in Tengrism, and its second-highest peak is known as Khan Tengri which may be translated as "Lord of the Spirits".