Pei Du
Meanwhile, in addition to Li Su, Li Guangyan and Wu Chongyin were also continuing to deal Wu Yuanji defeats, capturing the important city of Yancheng (郾城, in modern Luohe) in summer 817. Wu Yuanji put Dong Chongzhi in charge of his strongest army, which rode mules, and Dong was stationed at Huiqu (洄曲, near Yancheng) to defend against further attacks by imperial forces from Yancheng. Pei Du volunteered to serve as the overall commander of the operations, and Emperor Xianzong agreed. Pei soon arrived on the front and personally monitored the troop advancements. With Zhangyi in great difficulty, Wu Yuanji offered to surrender to Emperor Xianzong, and Emperor Xianzong was initially inclined to accept and promised not to execute Wu, but with Dong opposing capitulation, Wu's surrender never came.