I believe that people who like history are no strangers to Zhuge Liang and Sima Yi, who are old enemies on the battlefield. Shortly after the establishment of the Shu Han regime, Liu Bei died of depression due to the defeat at the Battle of Yiling, and before his death, he entrusted Zhuge Liang to the lone and let Zhuge Liang take charge of the military and political affairs of the Shu state. At this time, the Shu kingdom also appeared prosperous under zhuge liang's administration, and Zhuge Liang knew that this apparent stability was only temporary, and if it wanted long-term peace and stability, it was necessary to restore the unified Jiangshan.
Therefore, Zhuge Liang, under careful planning, began to deploy the plan of the Northern Expedition to the Central Plains, in the Common Era
Between 228 and 234, five attacks were launched against Cao Wei. However, Zhuge Liang was an extremely steady and careful man, and he adopted a steady and steady strategy in each advance plan, and did not have too many clever tricks, which also made Sima Yi sent by Cao Wei see this and respond by insisting on not fighting. So, in Zhuge Liang vs Cao
Although there were many victorious battles during the Wei army, they never moved the root of Cao Wei, let alone entered the core center of Cao Wei.
Due to the delaying tactics adopted by Sima Yi, Zhuge Liang suffered repeated setbacks in the course of the Northern Expedition. Therefore, the goal of achieving the "Revival of the Han Dynasty" was actually very far away for Zhuge Liang, who also knew it well, and in the last Northern Expedition Zhuge Liang himself fell ill and died in Wuzhangyuan. But Zhuge Liang was a genius, and he knew that if his death was known to the sinister and cunning Sima Yi, he would take advantage of the victory and pursue it, and then Shu Han would face the disaster of destruction.
Then, Zhuge Liang played an offensive trick, he knew that Sima Yi did not fight to drag himself to death, so he used this psychology to carve out a puppet that matched his own form, and deliberately let Sima Yi say that he was about to die, and led Sima Yi to chase after him; when Sima Yi saw Zhuge Liang's puppet, he thought that Zhuge Liang was a means of luring himself out of the city, and only then did he frighten Sima Yi alive. This also allowed Shu Han's troops to retreat to Shu territory in its entirety, preserving the living forces for Shu Han.
But paper can't contain the fire, the news of Zhuge Liang's death will always be made public, and at this time, Cao Wei has the most intelligent Sima Yi sitting in the seat, and there are so many top martial generals. On the other hand, Shu Han was a withered talent, and even Jiang Wei, who had high hopes from Zhuge Liang, was only a fledgling child. Under these circumstances, why didn't Cao Wei Tianzi let Sima Yi take the opportunity to attack Shu Han when Shu Han had just lost its backbone and the people's hearts in the country were not yet stable? This will also reduce the hidden dangers for Jiang Wei to cut Wei again in the future?
In fact, the reason is very simple, we all know that Zhuge Liang played the empty city plan on Sima Yi, although there was no such event in history, but Sima Yi knew that it was an empty city but did not dare to act rashly, it was entirely because Sima Yi knew the truth that the birds had done their best to hide since ancient times, so Zhuge Liang escaped a disaster. Therefore, although Sima Yi's prestige at this time was increasing, it also made Cao Wei Tianzi deeply jealous. Sima Yi was cunning and cunning, and he knew the truth of Gao Gong zhen lord. If Shu Han really perished, he himself would not have a good end, so he said to Tianzi: "Shu Han and Zhuge Liang cannot cause devastating harm to Wei, not to mention that shu Han now has no talent who can pose a threat to Cao Wei, as long as time is given, Shu Han will definitely finish playing in the hands of the later lord Liu Chan." What's more, if shu is rushed down, Eastern Wu will take advantage of the void and enter, and it will not be worth the loss. Cao Wei Tianzi felt that this was extremely reasonable, and temporarily gave up the opportunity to attack the Shu state.