李勉
In 776, Tian Shenyu (田神玉) the acting military governor of Biansong Circuit (汴宋, headquartered in modern Kaifeng, Henan), died. Tian's subordinate Li Lingyao (李靈曜) killed Tian's son and took over the circuit. Emperor Daizong initially reacted by making Li Mian the acting military governor of Biansong and commissioning Li Lingyao as the prefect of Pu Prefecture (濮州, in modern Heze, Shandong). When Li Lingyao refused, Emperor Daizong gave in and made him the acting military governor of Biansong, but when Li Lingyao subsequently refused to follow imperial orders, Emperor Daizong commissioned governors of the surrounding circuits — Li Mian, Li Zhongchen, Ma Sui, Chen Shaoyou (陳少遊), and Li Zhengji — to attack Li Lingyao. Later that year, with Li Zhongchen and Ma directly attacking Biansong's capital Bian Prefecture, they defeated Li Lingyao and forced him to flee. Li Lingyao was captured in flight by Li Mian's subordinate Du Rujiang (杜如江), and Li Mian had Li Lingyao delivered to Chang'an to be executed. Initially, the western half of Biansong was merged into Li Zhongchen's Huaixi Circuit (淮西, headquartered in modern Zhumadian, Henan), but after Li Zhongchen's subordinate Li Xilie mutinied and expelled him in 779, Emperor Dezong, while allowing Li Xilie to take over Huaixi, stripped Bian and Ying (潁州, in modern Fuyang, Anhui) Prefectures from Huaixi and added them to Yongping. He also had Li Mian move Yongping's headquarters to Bian Prefecture.