Wu and Chu were established at about the same time, the dimensions were almost the same, they drank the same river water, the titles were all viscounts, and the thrones were all self-proclaimed, and they were called "Jing Man" and "Ju Man" by the Central Plains for a long time (but the original meaning of "barbarian" at that time was that the pronunciation of people who spoke in the southern language family was entangled, and it did not have a derogatory meaning).

Wu and Chu had contact at least before the king of Chu Zhuang, when Wu and Yue were allied with Chu, but Wu was nothing more than a "small prince" equal to Qunshu and Huaiyi in the eyes of the Chu people. During the reign of King Chu Mu, he expanded the sphere of influence of Chu to the area around Qunshu, and the people of Wu felt a trace of pressure from the Western powers.

Through the efforts of two generations of Chu people, King Zhuang of Chu and King Gong of Chu, the State of Chu successfully divided the vast land of Qunshu as its own and expanded the land area to the west bank of the Yangtze River.

In the early and middle Spring and Autumn period, the armor and minions of the Chu state were in the north (Fangcheng Mountain, Shen, Xi, Hanshui), directly facing the princes of the Central Plains; There is almost no danger to defend in the east, and it is the soft belly of the Chu State.

After seizing the land of Qunshu, the eastern part of the Chu state formed a wide strategic depth (and also extended its tentacles to the border of the Wu state). This is a great thing worthy of relief and celebration for the Chu State, and it is tantamount to a huge threat and disaster for the people of the Wu State. Wu Guojun and his ministers were panicked, but they didn't know how to deal with it.

At the critical moment, God sent a great savior of Chu origin - Shen Gong Wuchen, who helped the people of Wu to formulate national military strategies, develop military industries, and conduct military education for scholars. As a result, Wu began to grow stronger, began to challenge the hegemony of Chu, and began to embark on the road of military expansion. In several subsequent encounters with the State of Chu, the State of Wu did not fall behind.

After King Ping usurped the throne, the state of Chu began to carry out a comprehensive strategic contraction: the people of Chu began to strengthen the border provinces and try to avoid provoking disputes as much as possible.

Chu's strategic change gave the people of Wu a valuable opportunity for continued expansion. The Wu people eliminated many of the threats and instability they saw, cleaned up some small countries, vassals and Yue people in the surrounding areas, and obtained a number of famous people such as Wu Yuan, Bo Yao, and Sun Wu. Now He Lu is ready to fight with the state of Chu and completely eliminate the threat from the West.

The dim-witted and incompetent King Chuping appointed the even more incompetent Nangwa as Ling Yin after Ling Yin's death. At that time, King Chuping's two sons, Prince Yishen and Prince Jie, had already shown excellent governing skills and noble moral character, but because both of them were half-brothers of Prince Jian, the father did not trust the two sons and did not give them due attention.

Before his death, King Chuping passed the throne to his youngest son, who was only eight or nine years old at the time, leaving him a country with powerful ministers inside and strong enemies outside.

In the early days of King Zhao of Chu's reign, the big villain Fei Wuji did not lightly harm the Chu State, and even got rid of the family of the benevolent Bo Haowan and the shilling Yin Zibian on the charge of collaborating with the enemy. Later, in order to maintain his reputation, Nangwa got rid of the big beetle and his comrades.

The Chu people thought that the country would be able to embark on the track of normal development from then on and regain the majesty of the reign of King Wu and King Zhuang. Although Nangwa has mediocre ability in governing the country, he is a good hand in bringing disaster to the country and the people. Fei Wuji stole the limelight from him during his lifetime, but as soon as he died, he exposed the sac tile.

After Fei Wuji's power was eliminated, Nangwa filled the void with his own cronies, henchmen, or villains who flattered him; The backstage of those villains is tougher than the previous ones, and the methods of exploitation are more sophisticated and cruel. What's even more hateful is that many villains don't have a "conscience" at all, and are not even loyal to their masters; After they exploited the wealth to a certain amount, they fled to foreign countries with the people's fat and ointment, and most of them fled to the state of Wu.

The villains first went to show their loyalty to Wu Zixu, but they were all blasted out by him without thinking - in Wu Zixu's opinion, those silverfish in his homeland were even more hateful than Fei Wuji, just filth like rats and maggots; No matter which country they go to, they will become the scourge of that country.

As a result, they all ran to the gate of Boya.

Bo Yao was overjoyed. If someone coaxed him to be comfortable, he recommended that guy to Helu, saying that the man was "of noble character and outstanding ability" and could be appointed as an official of one party.

But at this time, Wu Zixu resolutely opposed it, and even demanded that that kind of people be expelled from Wu State, saying that wherever they go, it will be a disaster for the country; It is intolerable that they will come to plague the State of Wu after they have harmed the State of Chu.

In order to balance the relationship between the two important ministers, He Lu asked Bo Yao not to recommend people who fled without guilt, and advised Wu Zixu not to want to drive the exiles out of Wu at every turn.

The arrival of the exiles greatly strengthened Bo Ya's strength, and he did a lot of things to add glory to him. Therefore, in the era of Fucha, the weight of Bo Yao in the heart of King Wu exceeded that of Wu Yuan, and the gap between the two became bigger and bigger.

After the Wu invaded Chu only to be stabbed in the back by the Yue (in the first year of Luding), He Lu expressed to the Chu people through the Shu Jiu people (although Qunshu was destroyed, but those ancient families still lived in place) that they wanted to ease relations between the two countries (in fact, these appearances were false, and were a prelude to the next war plan against Chu).

Nangwa was overjoyed and immediately sent an envoy to Shujiu to hold talks with the Wu people, and the two countries signed a peace agreement after the meeting. The content of the agreement is generally similar to the Jin-Chu alliance agreement of the "Huayuan Army". The covenant stipulated that the two countries would end hostilities; Any country that dares to be unfavorable to the state of Chu will be helped by the state of Wu to carry out a crusade against the state of Chu; Vice versa.

Nangwa regarded this as a great victory for the "United Vietnam Containment of Wu" plan. But Zuo Sima Xu said: "As long as there are soldiers and Bo Yao, it is impossible for Wu to make any move in favor of Chu; In this case, if it is not for the state of Wu to attack the state of Yue with all its might, it will be the prelude to the next damage to the state of Chu. So we can't let our guard down for a moment. ”

Nangwa was very upset by Zuo Sima, so he sent him an errand to inspect the defense, and took away the chatterbox who was always singing badly. After that, he began to celebrate this "great victory" with various ceremonies and banquets.

After the signing of the peace treaty, the Wu people shifted their strategic focus to the Yue people: He Lu arranged warships along the Qiantang River and built two more fortresses along the river. In this way, Zuo Sima Xu was even more convinced that his judgment was correct.

The ancient Tong Kingdom (near present-day Tongcheng, Anhui Province) was a small ancient Yin Shang state that was able to preserve the community by taking the side of the powerful in the Chu State's war to destroy Qunshu. However, in recent years, Tongguo has been subjected to various exploits by the powerful ministers of Chu.