班超
In Yiwulu, Dou Gu set up an agricultural garrison, and appointed a commander to make sure that the army stationed in the Western Regions had a lasting supply of provisions. In the same year, Dou Gu sent Ban Chao and Guo Xun along with 36 men to go south. Ban Chao successfully organised the three states of Shanshan, Yutian and Shule against the Xiongnu, restoring peace and order in the Western Regions. Subsequently, in 74, the Han government reestablished the Protectorate of the Western Regions, in the city of Jinman at the state of North Jushi. In 75, on the death of the short-reigned Emperor Ming of Han, the Xiongnu with its allies seized their opportunity and captured Jushi and Liuzhong, and killed the Protector General Chen Mu. In 76, the Han government abrogated the Protectorate of the Western Regions. As the Western Region's situation was getting precarious, Ban Chao, who was left to defend Shule and Yutian, won the support of the local officials and people and drove the Xiongnu troops from the capital of Gumo in Shicheng. In 80, he wrote to the imperial court, proposing that they send more troops to the Western Regions. The new emperor agreed to his proposal and ordered Xu Gan to lead an army to help Ban Chao.