In 382, the Former Qin king Fu Jian sent General Lü Guang on a military expedition to the Dayuan kingdom and promoted him to Protector General of the western border regions.
Dayuan |
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.