Li Mian
After Li Xilie's victory over Liang, instead of turning Shannan East over to imperial authority, he began to act as if it were his private domain. Emperor Dezong, remembering Li Cheng's remarks, sent Li Cheng to Shannan East to serve as military governor — with no escorts, at Li Cheng's own request. Once Li Cheng got to Xiang Prefecture, Li Xilie initially refused to let him take over its governance and housed him at a pavilion for guests, and then tried to intimidate him with threats. Li Cheng refused to leave, and Li Xilie, unwilling to break with the imperial government at that time, allowed his soldiers to pillage Xiang Prefecture and then withdrew back to Huaixi. In 782, with imperial forces engaging the forces of Tian Yue, Wang Wujun, Zhu Tao (both Wang and Zhu having participated in Li Weiyue's destruction earlier but then rebelled in light of Emperor Dezong's failure to grant them territory that they wanted), and Li Na (Li Zhengji's son, who had taken over after Li Zhengji died later in 781 as well), Emperor Dezong made Li Xilie the military governor of Pinglu, intending to have him attack Li Na. Li Xilie, however, was in secret communication with the four rebels, who had declared themselves princes independent of Tang, and he, under the guise of attacking Li Na, moved his headquarters to Xu Prefecture (許州, in modern Xuchang, Henan) and requested permission from Li Mian the military governor of Yongping Circuit (永平, headquartered in modern Kaifeng, Henan) to pass through his territory. Li Mian, suspecting Li Xilie's intentions, granted permission but put his forces on high alert. Li Xilie, realizing that Li Mian was on guard, did not attack him. However, Li Xilie then claimed several titles that had not been granted him by Emperor Dezong — the supreme commander of the armed forces, "Taiwei" (太尉, one of the Three Excellencies), and the Prince of Jianxing.