Li Zhengji
Meanwhile, Li Baochen had also been in alliance with several other military governors who were also ruling their circuits independently from the imperial regime and intending to pass their realms to their descendants — Li Zhengji the military governor of Pinglu Circuit (平盧, headquartered in modern Tai'an, Shandong), Tian Chengsi the military governor of Weibo Circuit (魏博, headquartered in modern Handan, Hebei), and Liang Chongyi the military governor of Shannan East Circuit (山南東道, headquartered in modern Xiangfan, Hubei). When Li Baochen and Li Zhengji, in succession, died in 781, then-emperor Emperor Dezong (Emperor Daizong's son), wanting to break up the warlords' power, refused to let Li Weiyue and Li Zhengji's son Li Na inherit their fathers' positions. Li Weiyue, Li Na, Tian Chengsi's nephew and successor Tian Yue, and Liang thus prepared for war against the imperial regime. Liang was quickly defeated by Li Xilie and committed suicide, while imperial forces inflicted serious damage on Tian's and Li Na's forces. Meanwhile, Zhu Tao the acting military governor of Lulong Circuit (盧龍, headquartered in modern Beijing) attacked Li Weiyue from the north and was quickly able to persuade two key Chengde officers, Zhang Xiaozhong the prefect of Yi Prefecture (易州, in modern Shijiazhuang) and Kang Rizhi () the prefect of Zhao Prefecture (趙州, in modern Shijiazhuang), to submit their respective prefectures turn against Li Weiyue. When Li Weiyue tried to counterattack in spring 782, Zhu and Zhang's joint forces defeated him at Shulu (束鹿, in modern Shijiazhuang), forcing him to flee back to Chengde's capital Heng Prefecture. It was said that during the Battle of Shulu, Wang Wujun, serving as Li Weiyue's forward commander and believing that Li Weiyue was already suspicious of him, decided not to fight to the best of his ability, and that this led to the defeat.