Yin Mountains
By summer 880, however, the tide began to change against Li Keyong and his Shatuo forces. As the newly Tang-commissioned military governor of Datong, Li Zhuo (李涿), was joining forces with Li Keju the military governor of Lulong Circuit (盧龍, headquartered in modern Beijing) and the Tuyuhun chieftain Helian Duo against Li Keyong, Li Keyong left his officer Gao Wenji (高文集) in charge of his base at Shuo Prefecture (朔州, in modern Shuozhou, Shanxi) and stationed himself at Xiongwu Base (雄武軍, in modern Chengde, Hebei) to defend against Li Keju. Li Zhuo used this opportunity to entice Gao to surrender. Li Keyong tried to return to Shuo to recapture it, but was intercepted by Li Keju's officer Han Xuanshao (韓玄紹) and defeated, with Li Jinzhong and Cheng killed in battle. Meanwhile, Li Zhuo and Helian attacked Li Guochang at Yu Prefecture, defeating him. Both Li Guochang and Li Keyong were forced to abandon the region and flee to the Dada (達靼, then in the Yin Mountains region).