元史
The name of "Kuytun" () was from the Mongolian language, meaning "extreme cold" (). The name of "Kuiteng" (), which firstly appeared in the official historical book "History of Yuan" (), was the present Kuytun River. According to legend, in the period of Mongolian Westward Expansion, Genghis Khan' troops once stationed in the place, when it was very cold in winter, his soldiers shouted "Kuitun", since that time, the place was named after "Kuytun".