During the Three Kingdoms period, the Three Kingdoms led by Liu Bei, Sun Quan, and Cao Cao were dominant, and after the Battle of Chibi, Liu Bei was most likely to unify the Central Plains to end the situation of the Three Kingdoms, but he did not expect that Guan Yu's death changed the whole situation, and Shu Han became the first country in the Three Kingdoms to be destroyed. The biggest hero who destroyed Shu Han was none other than Deng Ai, who found something in Liu Chan's palace after Ai destroyed Shu and understood why Zhuge Liang could not save Shu Han.
Deng Ai was a general of Cao Wei, but he did not participate in the peak of the Three Kingdoms, when he was just a small guard of the rice fields in the Tuntian people, because he was born humble and suffered from stuttering, so he squatted silently for 20 years before he finally became a pawn cao. He likes the military, likes to study the terrain, survey the terrain, and does things carefully and carefully, the so-called opportunities are left to those who are prepared, Deng Ai met the noble man who changed his life at this time - Sima Yi.
At that time, Cao Wei wanted to store grain in the southeast to deal with the State of Wu, so he sent Deng Ai to inspect the tuntian and then report to Sima Yi. When Deng Ai reported the results of the survey to Sima Yi, because of the comprehensive narration, but also gave specific suggestions and implementation plans, which made Sima Yi very satisfied, recruited him as a subordinate of the Taiwei Mansion, and later promoted to Shang Shulang, thus starting his career.
Of course, his highest moment was the time to destroy the Shu kingdom, although at this time the Shu kingdom had no Zhuge Liang, but because of the complex terrain, it was still difficult to attack, but Deng Ai only used 30,000 soldiers to successfully ambush Shu Han, let Liu Chan raise the white flag, obediently open the city gate and let Deng Ai enter the city. After Deng Ai entered the city, he found an object in Liu Chan's palace, which was the Shu Han 'Shi Min Book", which detailed all the population of the Shu Han, including the number of troops and officials.
It can be seen from the above that the Shu Han Dynasty already had a serious deficit, and every nine peasants had to support a soldier, which showed the great pressure of the common people, and this situation must have been clear to Zhuge Liang when he was alive, but he was powerless to change this phenomenon. However, such an important thing as the Shimin Book was casually discarded in the corner by Liu Chan, which showed that the demise of Shu Han was sooner or later.