Chizhishizhuhou Chanyu
The southern Xiongnu were a branch of the eastern Xiongnu that followed the rebellious pretender Huhanye and in 51-53 BC moved en masse within the Han borders under protection of Chinese. Since the times of Huhanye, the status of the southern Xiongnu was loyal allies of the Han Dynasty. The southern Xiongnu enjoyed material support of the old "heqin" treaty, and in return guarded the Chinese northern borders and participated in the Chinese external and internecine conflicts as long as the Chinese court respected their independence. However, when the Han imperial court attempted to appoint an ineligible for the crown Western Jükü-Prince Yufuluo from ineligible Right Wing as a Chanyu, instead of respecting the traditional election, the southern Xiongnu dissented and elected a lawful alternate Hyuibu Gudu-heu. Later they expelled Yufuluo, who had to seek safety in exile at the Han imperial court.
Han–Xiongnu War
In 73 AD, General Dou Gu and his army departed from Jiuquan and advanced towards the Northern Xiongnu, defeating the Northern Xiongnu and pursuing them as far as Lake Barkol before establishing a garrison at Hami. In 74 AD, Dou Gu retook Turfan from the Xiongnu. The Han campaigns resulted in the retreat of the Northern Xiongnu to Dzungaria, while Ban Chao was threatening and bringing the city-states at the Tarim Basin to submission under the Han empire once again. In 74 AD, the King of Jushi submitted to the Han forces under General Dou Gu as the Xiongnu were unable to engage the Han forces.