李愬
Meanwhile, with another imperial general, Li Guangyan the military governor of Zhongwu Circuit (忠武, headquartered in modern Xuchang, Henan), frequently prevailing over Zhangyi forces, the most elite Zhangyi troops were stationed at Huiqu (洄曲, in modern Luohe, Henan), to defend against a possible Li Guangyan advancement. Li You thus suggested to Li Su that the defenses of Cai Prefecture would be particularly weakened and that the opportunity was right for an attack. Li Su reported his plan to the chancellor Pei Du, who had by this point been put in charge of the operations against Zhangyi, and Pei approved.