The last Protector General, Dan Qin, was killed during a rebellion led by Yanqi in 13 AD.
During the service, he was killed by the rebels from the state of Yanqi and Qiuci in 75.
Yanqi Hui Autonomous County (焉耆回族自治县), in Bayin'gholin Mongol Autonomous Prefecture
According to Hanshu, the various states of the Western Regions, including Yanqi, were controlled by the Xiongnu, but later came under the influence of the Han Dynasty after its show of force when it attacked Dayuan (Fergana) late 2nd century BC.
In 1998, Chinese linguist Ji Xianlin published a translation and analysis of fragments of a Tocharian Maitreyasamiti-Nataka discovered in 1974 in Yanqi.