Guo Jia is a popular figure among the history lovers of the Three Kingdoms. The film is called "Military League", so Guo Jia, Cao Cao's strategist, must play a very important role in the play, even playing a guiding role. In this case, Sima Yi will have a chance to "thank Guo Jia".

An important reason for Guo Jia's fame is the theory of "ten wins and ten losses" blown by the Romance of the Three Kingdoms. The theory of "ten wins and ten losses" actually only strengthened Cao Cao's self-confidence against Yuan Shao, but did not point out the direction for Cao Cao in strategy and tactics. In addition, the theory of "ten wins and ten losses" only integrates the opinions of Yu Xun and Jia Xu, and was not initiated by Guo Jia.

The theory of "ten wins and ten losses" not only plagiarized, but also degraded Yuan Shao to nothing. Overestimation of oneself is the taboo of modern war. Every feudal ruler in history needed a vase-like clown to erect a monument for himself, and Cao Cao also liked people like Guo Jia.

Where was Guo Jia's lair when Wancheng was defeated by Zhang Xiu? Even Chen Shou was deeply poisoned by the clowns' gaffes, and he no longer vilified Yuan Shao in the history of the Three Kingdoms. Luo Guanzhong, the author of Romance of the Three Kingdoms, even forged a story of "Guo Jia's will decided Liaodong" for the sake of myth of Guo Jia, turning a dead man into the first hero who decided Liaodong. Obviously, we can see that Luo Guanzhong disrespected Liu and degraded Cao.