Zhuge Liang was a very talented figure. And when Zhuge Liang took control of the Shu Han regime, Zhuge Liang also made a hundred times more efforts to carry out the Northern Expedition against Cao Wei. However, even so, Shu Han was still in the ascendant. And why? The secret of this surfaced after the demise of the Shu Han.
Deng Ai
The fall of the Shu Han was due to the fact that Deng Ai took advantage of the opportunity of the main force of the Shu Han and the Zhong Hui to fight at the front line, bypassing the main force of the Shu Han army, and the soldiers were in danger, and the soldiers were outside the city of Chengdu. Liu Chan, the emperor of the Shu Han Dynasty, faced the sudden arrival of Deng Ai's army and fell into a state of panic. The local warriors in Yizhou were also tired of decades of war, so they also used this opportunity to put pressure on Liu Chan, and in this way, Liu Chan had to declare his surrender, and from then on, Shu Han perished.
After the fall of the Shu Han Dynasty, Deng Ai had no choice but to inventory the shu Han treasury, and when Deng Ai counted the wealth in Liu Chan's palace, he found a book: Shu Han's "Shi Min Bo". This book records the population of the Shu Han Dynasty. Based on the above data, Deng Ai realized that even if Zhuge Liang had three heads and six arms, he could not reverse the sad situation of Shu Han at that time.
According to the data in the "Scholar and People's Book", shu han had a population of more than 900,000, of which there were more than 100,000 troops and more than 40,000 administrative organs. This meant that when Shu Han launched the Northern Expedition against Cao Wei, human resources faced a serious shortage: because the army needed to go to the front line to fight, and the grain transportation and production work in the rear needed to be managed. None of this could be sustained by the shu han's more than 900,000 people.
In fact, at that time, cao wei had five states in his hands, while Shu Han had only one Yizhou. In this regard alone, shu Han did not have an advantage. And the data in "ShiMin Bo" is very intuitive to tell us the strength gap between Shu Han and Cao Wei. Therefore, Deng Ai also understood Zhuge Liang's difficulties. After all, in this case, unless Cao Wei came to power in a suicide mode, Shu Han had no hope of victory.