夏侯玄
Cao Shuang's staff officer Yang Wei () realised the danger and begged Cao to abandon the campaign and retreat immediately, but Deng Yang objected and argued with Yang despite his lack of military knowledge. Yang Wei could not convince either and furiously claimed that Deng Yang and Li Sheng were disregarding the lives of hundreds of thousands, as well as the fate of their state, and they should be executed. Cao Shuang was unhappy with such suggestions and rejected both of them. Grand Tutor Sima Yi, who opposed the campaign from the very beginning, could no longer ignore the dangerous situation and wrote to Xiahou Xuan to inform him about the impending disaster, and warned him that he was personally aware that years ago, Cao Cao almost suffered a total defeat in the struggle against Liu Bei for Hanzhong. The Shu army was in firm control of Mount Xingshi, which prevented Wei forces from pushing forward, and if another Shu force cut off the Wei retreat route, Cao Shuang and Xiahou Xuan would not even be able to live to regret their decisions. Xiahou Xuan finally realised the dangerous situation they were in after reading Sima Yi's letter, and finally managed to convince Cao Shuang to give the order to retreat, albeit the latter did so reluctantly. Guo Huai had also realised the danger of their situation, and withdrew his troops to avoid the presumable rout.