Overview
Qushu is the Khitan leader the Tang histories record in 842; the Liao History's Yelan Qaghan is identified with him.
Rise to Power
He came to power about the time the Uyghur Khaganate fell, in 840–842.
Rule and Achievements
- In 842 broke with the Uyghurs and submitted to the Tang, which gave him Tang military rank
- The Tang military governor Zhang Zhongwu replaced the seal the Uyghurs had given the Khitans with a new Tang seal
Legacy
With the Uyghurs gone, the Khitans began to fill the empty steppe to their west. His dates after 842 are a modern estimate. Bala Qaghan followed him.