 After several victories, in winter 776, they put Bian Prefecture under siege.When Tian Chengsi dispatched an army commanded by his nephew Tian Yue to aid Li Lingyao, Li Zhongchen sent his subordinate Li Chongqian () to launch a surprise attack on Tian Yue's army, causing it to collapse.Without aid, Li Lingyao fled, but was captured by Li Mian the military governor of Yongping Circuit (永平, headquartered in modern Anyang, Henan) and delivered to Chang'an to be executed.