In 223, Liu Bei, who had lost the Battle of Yiling, recruited Zhuge Liang from Chengdu to the White Emperor's City, and began his trust with Zhuge Liang. At that time, Liu Beicheng's talent and learning were ten times that of Cao Pi, and he was bound to be able to achieve great things, so he handed over his son Liu Chan to Zhuge Liang. If Liu Chan could assume the responsibility of ruling shu Han, Liu Bei hoped that Zhuge Liang could assist Liu Chan well, and if Liu Chan did not have such ability, then Zhuge Liang could appoint someone else as emperor. In this regard, Zhuge Liang single-handedly took over the military and political power of shu Han, and then recovered Nanzhong and sent troops to the Northern Expedition. Unfortunately, after experiencing five Northern Expeditions, Zhuge Liang finally failed to win a strategic victory and died of illness in Wuzhangyuan. Chen Shou said in the "Romance of the Three Kingdoms" that Zhuge Liang was not good at wisdom and strategy, so if it was not Zhuge Liang who came to Liu Bei's camp that year, but Guo Jia, who was known as a ghost talent, could the Shu Han camp go further?
In fact, if it was not Zhuge Liang who followed Liu Bei at the beginning, but Guo Jia, I was afraid that Liu Bei would not be able to take this step of establishing Shu Han at all. You must know that in Cao Wei, the only one who can be compared with Zhuge Liang is Xun Yu. Like Zhuge Liang, Xun Yu was the second in command of the regime, with the talent of Wang Zuo, the leader of the civilian official clique, they were all good at recommending talents, they were also masters of internal affairs, and they were also gentle and elegant strategists. Strategically, Zhuge Liang raised the right side of the battle, thus establishing the development direction of Liu Bei's clique, diplomatically, Zhuge Liang united with Eastern Wu to resist Cao Cao, in internal affairs, Zhuge Liang through Jingyi, recommended talents, coordinated hundreds of officials, in the military, Zhuge Liang Ping Nan man, Zhen Jingzhou, stabilized the precarious situation of Shu Han after Liu Bei's death, and saved the building from falling.
Guo Jia's bias in ability is different from Zhuge Liang's, he is a strategic ghost, full of ingenuity, he has no exhaustive strategy, first with Xun Yu to hold the "ten victories and ten defeats theory", to stabilize Cao Wei's army, to help Cao Cao defeat Yuan Shao, not only that, Guo Jia also offered plans to attack Liu Bei and Qingzhou, help Cao Cao gradually consume the remnants of Yuan Shao's forces, and also follow Cao Cao to defeat Wu Huan and unify the north. But for Liu Bei, he actually had another Guo Jia under his command, that is, Fazheng.
It should be known that Fa Zheng is good at miracles, and as soon as he saw Liu Bei, he decided that Liu Bei was the lord of xiongcai, and it was precisely because of the existence of Fa Zheng that Liu Bei occupied Yizhou and captured Hanzhong, thus achieving a career. However, Fa zheng did not bring Liu Bei the Longzhong Pair, nor did he help Liu Bei defeat Cao Wei, which shows that Liu Bei, who had Fazheng, was also unable to unify the world.
The author believes that Guo Jiazhi's ability is similar to Fazheng's, but they do not have Wang Zuozhi's talent and lack the ability to govern the country, so even if they have Guo Jia, they will not go further than having Zhuge Liang.