이변
In 940, Li Jinquan, Later Jin's military governor of Anyuan Circuit (安遠, headquartered in modern Xiaogan, Hubei), rebelled against Later Jin, and sought aid from Southern Tang. Li Bian sent the generals Li Chengyu () and Duan Chugong () to aid Li Jinquan, but with instructions not to pillage and to, with haste, escort Li Jinquan back to Southern Tang territory safely. However, in violation of Li Bian's instructions, Li Chengyu seized Li Jinquan's wealth and tried to defend the city, and subsequently engaged and was defeated by the Later Jin general Ma Quanjie (). Duan was killed in battle, while Li Chengyu was executed by Ma. Some 4,000 Southern Tang soldiers were lost. This caused Li Bian to be saddened for days and blaming himself for not giving even harsher warnings to Li Chengyu. When Later Jin's emperor Shi Jingtang subsequently tried to return the 570 Southern Tang captives to Southern Tang, Li Bian refused to accept them, citing, in a letter to Shi, that they violated his orders. They remained at Later Jin subsequently.