The ruins of Luntai City are located in Bayingolin Mongol Autonomous Prefecture in Xinjiang. It is only 200 kilometers away from the Taklamakan Desert, located at the junction of two streams of snow-melt water from Tianshan Mountains.

The rammed construction with barbican entrances is called Kuiyuq Shehayer, which means "city in ashes." Recently discovered relics revealed that it is the oldest city ever unearthed in Xinjiang.