Xiguo is located near Xixian County, Henan, about 300 kilometers away from Zheng Guo, and is a Hou State surnamed Ji. Xi Guo and Zheng Guo are separated by Cai Guo.

The reason for the conflict between the two countries was that one of Zheng Guo's caravans had been shamelessly exploited by tax officials in Xi Guo, and when the merchants argued with their reasoning, Xi Guo people actually began to use force. As a result, all the goods and money of the merchants were robbed, and many were injured; To the surprise of the merchants, the officials were very sophisticated in their methods of robbery, and their combat effectiveness was stronger than that of the robbers.

Zheng Guo did not have diplomatic relations with Xi Guo, but Chen Guo and Xi Guo had a very close relationship, so Zheng people sent an envoy to Chen Guo and asked Chen people to guide Zheng Guo's envoy to Xi Guo to negotiate.

But what Zheng Ren didn't know was that the master behind this gang of officials and bandits was Xihou. The Marquis connived at the officials to rob in a blatant manner, and the officials offered half of the stolen goods to the Marquis of Xi. When the envoys of Zheng Guo arrived at the court of Xiguo, Xihou unceremoniously drove them out.

Shortly after the expulsion of Zheng's envoys, the officials who had done all the evil were inexplicably executed – they were beheaded on their knees with their hands tied behind their backs. Xihou couldn't find the murderer, so he settled the account on Zheng Guoren, and he decided to teach Zheng Zhuanggong a good lesson.

This man is not so much an extraordinary courage as an extraordinary ignorance. It's not that he doesn't know Zheng Guo's military strength, but he is still ready to risk his life. He was begging Chen and Cai, but the monarchs of both countries kept shaking their heads. So the Marquis of Xi led a lone army to the north, and the Xi army crossed the state of Cai and soon reached the border of the state of Zheng.

Zheng Guoren decided to fight the enemy happily to vent his anger against King Huan of Zhou. Zheng Jun lined up in a dignified array on the edge of the border, and when the people of Xi Guo saw the strict military formation on the opposite side and the banner erected like a dense forest from a distance, their bodies began to tremble.

When the Xi army finished marching, the Zheng army began to beat the drums and advance. The formation was pushed straight through like a heavy wall, and the soldiers of the first column on both sides were immediately huddled together. Both sides use their shields against each other's shields and stab the enemy soldiers with their swords.

It didn't take long for the hand-to-hand encounter, and the rest of the army couldn't stand it. The army began to retreat slowly, and as a result, the formation became more and more scattered, and the soldiers threw down their weapons and fled.

Zheng Zhuanggong didn't want to kill too many people, he ordered that as long as the other party was driven out of the country, he was not allowed to cross the border to pursue. The Zheng army captured many wounded soldiers and captured all the baggage.

Later, Zheng learned that Xihou had not learned from his failure; He still went his own way, living a life of luxury and depravity. He said to Zheng Zhuanggong: "We should guard against the state of Chu!" Xihou has no virtue, does not measure his own strength, does not have the same surname, has no name, and does not investigate the guilt; He made five big mistakes and crusaded against others, how could he not fail? If he does not repent, he will surely perish. The one who can destroy the country must be the state of Chu. If the state of Chu destroyed the state of Xi and the state of Shen, it could rely on the two countries to march into the Central Plains, and Chen and Cai would be the first to be conquered; Zheng Guo is located on the main road of the Central Plains, connecting the east and west, and will definitely be coveted; And no matter which country of Qi and Jin becomes the overlord of the north, it will have to compete with the state of Chu, and then the state of Zheng will have no peace. ”

By October, the Song people, who had been unlucky, finally breathed a sigh of relief. It turned out that the Song people had been closely watching Zheng Guo's movements, and they thought that Zheng Guo had already fought two major battles this year, and the soldiers should be quite tired; Moreover, it is now the end of the year, and the cold weather is no longer suitable for war; In this way, Zheng Guo will not come to trouble again this year, and the people of Song Guo can finally spend a rare year of peace.

However, Zheng Guoren would rather suffer more sins himself than tolerate Song Guoren living a satisfactory life. As mentioned earlier, if it weren't for the sudden start of war by Xihou, Zheng Zhuang Gong would have wanted to attack the Song Dynasty.

Although it was already the end of the year, the plan to attack the Song State was not canceled, but was postponed. Just as the Song people were steadily preparing for the holding of the Lap Festival, Zheng Zhuanggong led the Zheng and Yu armies to kill Shangqiu.

This joint operation can be seen as a subtle result of the compromise between the royal family, Zheng, and Yu: King Huan of Zhou extorted a large area of land from Zheng, and he must give the Zheng people something in return; Zheng Zhuanggong wants to appease the anger of the Chinese people over the land exchange incident, and to avenge the Song people's desecration of Zheng Guotaimiao last year; And Duke Yu found that without the support of Zheng Zhuanggong, he couldn't play in the princess doctor at all.

On the day of Renxu, the coalition forces first defeated the Song army that had rushed to the battle on the outskirts of Shangqiu, and then besieged the capital of the Song state. Song Guo was greatly injured in the battle of Dai and was no longer able to confront Zheng Guo; The Song people then held on. Seeing that his goal had been achieved, Zheng Zhuang ordered the withdrawal of the army.