During the Three Kingdoms period, Sun Quan adopted a diplomatic concession strategy, which was affirmed by the society at that time and later in history. In fact, Shu is their biggest friend, and Wu is their only enemy.

The diplomatic strategy at that time, regardless of his enemies and friends, would enhance his own ability for a while, but it would also weaken the interests of his friends, but in the end he was still hurt.

therefore, this is essentially a failure. Distinguishing between enemies and friends is the basis of diplomacy, and the standard of enemies should be the long-term and fundamental interests of the country, not the immediate and local interests.

different diplomatic strategies should be adopted when dealing with enemy countries and friendly countries. Sun Quan adopted a diplomatic strategy between Wei and Shu. Most scholars think this is a flexible and effective strategy. In fact, in essence, Sun Quan's diplomatic strategy finally failed.

from the perspective of Shu, the irreconcilable contradiction and weak position between Shu and Wei determine that Shu Han can become a reliable ally of Dongwu. First of all, the internal contradiction between Wei Shuwu decided that Shu could not become an ally with Wei.

Cao Cao expanded his power in the struggle to discuss the yellow turban insurrectionary. He became famous by reducing separatist forces in various places, became the de facto supreme ruler, and successfully established the world of Cao Wei.

Liu Bei participated in Cao Cao's plot. If the attempt was not completed, Liu Beihui was spared because of his troops, and he immediately announced his rebellion against Cao Cao and complained to each other.

At the same time, it also sets the tone for the future relationship between Wei and Shu: there is no * * * existence, and there is no * * * similarity. In fact, Shu has always actively established and maintained its alliance with Wu.

therefore, the responsibility for destroying the alliance lies entirely with the state of Wu. Shu maintained an alliance with Wu until its demise. It can be seen that self-interest determines that Shu must establish an ally relationship with Wu, and Shu is a reliable ally of Wu. Shu and Wu fought for Jingzhou for their country's fundamental interests and basic national policies, which is completely understandable and contradictory.

However, this contradiction is secondary to the contradiction between Wu and Wei, and the contradiction between Shu and Wei can be resolved through peaceful means. Because the fundamental problem between Wu and Shu lies in its interests, although there is conflict and hatred between Wu and Shu, there is no major rift in the alliance between Wu and Shu. This fact further confirms the contradiction between Wu and Shu, and Shu can be solved by non-confrontational means.

As long as we read the history of the Three Kingdoms, we can find that Cao never gave up destroying Wu's heart. In the battle of Chibi, Cao Cao's main goal was Sun Quan. After Cao Cao unified the north, he defeated Dongwu and unified the world.

Although Battle of Red Cliffs ended in Cao Cao's failure, Cao Cao's strength is still the strongest among the three countries. In the Han Dynasty, it was the second of the three countries, and it occupied the political, economic and cultural center at that time.

at that time, the population was only four-sevenths. It can be said that it is a vast territory and a huge population, and the Dongwu power created by Sun Quan lies between Wei and Shu.

Therefore, Wei regards Wu as the biggest obstacle to unifying the world. So, why did Wei and Wu establish diplomatic relations? The essence of Wei's diplomacy with Wu is to control Wu, first turning Wu into a vassal of Wei, and then annexing Wu.

Another goal of establishing diplomatic relations between Wei and Wu is to allow Wu and Shu to compete, so that Wei can take advantage of Wu's advantages. Cao Wei used to think that he was powerful most of the time. With the increasing prosperity of the political situation at that time, Wu was in the arms of Wei, and his relatives were injured. The enemy quickly attacked Guan Yu.

Although Wu won Jingzhou, it seriously weakened the strength of its allies. However, the biggest gain came from Wei, who solved many difficulties, hit Shu hard without soldiers, and took this opportunity to threaten Wu.

from the above analysis, we can see that Wu and Shu are interdependent. If one country is damaged, another country must not rule.

However, in the 24th year of Jian 'an, General Guan Yu of Shu entered Jingzhou and attacked Xiangyang in the north, which drowned the troops at that time, besieged the city and captured General Guan Yu's troops.

Although Wu once established diplomatic relations with Cao Wei, Wu and Wei have established good relations, the essence of which is to use pleasant methods to gain Wei's pity for survival.

in history, how can a country survive by pleasing its enemies with slavery? Therefore, after Wu's national strength was slightly stronger, Wei was prepared to use force to calm it down.

With Wei and Shu, Wu and Wei could have gained their independence by maintaining their alliance with Shu, but Sun Quan chose to please Wei in order to survive, and in the end he could only deceive himself.

the evaluation of a person or a strategy should not be critical, but objective and fair. Chen Shou, the author of The History of the Three Kingdoms, commented that "Sun Quan bowed down and endured humiliation, and his talents were still counted, which was the wonder of Gou Jian and the outstanding talent of the British", which was the best footnote for Sun Quan's submission to Wei.

As far as Sun Quan himself is concerned, Sun Quan inherited the foundation of his father and brother when he was young, and then established the Wu Kingdom of the Three Kingdoms, making it the longest of the three countries, and its historical achievements are indelible.

On the whole, Sun Quan is still an outstanding politician. Sun Quan gave in and endured humiliation. He was very talented and had the power to do things. However, we can't deny that Sun Quan made a mistake in dealing with Jingzhou and Shu League.

Sun Quan gained vested interests in front of him, but paid a heavy price for it, that is, the disintegration of the alliance and the serious weakening of the alliance. Although there are many reasons for Wu's demise, the failure of Wu's diplomatic strategy must be regarded as one reason.

References:

The History of the Three Kingdoms.