What is "taranchi"

Taranchi is a term denoting the Muslim sedentary population living in oases around the Tarim Basin in today's Xinjiang, whose native language is Turkic Karluk, and whose ancestral heritages include Iranian and Tocharian populations of Tarim and the later Turkic peoples such as the Uyghurs, Karluks, Yaghmas, Chigils, Basmyls and lastly, the Mongolic tribes of the Chagatai Khanate.