In the spring of the fifteenth year of the reign of Emperor Lu Zhuang (BC679), the five kingdoms of Qi, Song, Zheng, Chen, and Wei held an alliance meeting again in Juancheng. The main topic of this alliance meeting was how to establish a stable alliance led by Qi State. The purpose of establishing the alliance is to maintain the security of the Allied countries and develop the economies of the allied countries. The Five Kingdoms signed an alliance as the founding members of the alliance, and the Juancheng Alliance is considered to be the beginning of the establishment of hegemony by the Duke of Qi Huan.

In the autumn, the states of Qi, Song, and Yi sent troops to attack the state of Yin, which relied on the support of the princes of Dongyi and had invaded the state of Song many times. This joint operation can also be regarded as a practical exercise of the alliance against the covenant.

Zheng Ligong's buttocks were unstable at the beginning of the reset, so he pretended to be magnanimous and not to blame the past. But his unusual behavior caused people to be even more suspicious and uneasy. It was believed that, with the narrow and mean temperament of the Restorationists, sooner or later the old enemy would have to be liquidated; The more casual he pretended, the more brutal his revenge became.

As a result, the Zheng people have their own concerns, and the domestic contradictions are complicated; Zheng Ligong needs to transfer this contradiction abroad, and hopes to restore the country's prestige and gain the support of Zheng people through a victory.

In winter, Zheng Guoren took advantage of the Song army's expedition and the emptiness of the country to brazenly launch an attack on the Song State. The Song State suffered huge losses due to its defenselessness. Although the Zheng people felt relieved of their hatred, the princes were very annoyed.

In the summer of the following year (678 BC), the Song State gathered the Qi and Wei armies to retaliate against the Zheng State. This military operation was expected by Zheng Ligong, and Zheng Guoren resolved it relatively calmly; Zheng Ligong did not confront the coalition forces head-on, but expressed his willingness to take responsibility for his previous impulsive actions, and abide by the provisions of the covenant, obey the Qi state, and make good friends with the princes.

Not long after the Central Plains princes withdrew, the people of Chu came to trouble Zheng again.

As mentioned earlier, Zheng Ligong has always been supported by King Wen of Chu when he occupied Liyi. After Zheng Ligong was reinstated, he was busy dealing with domestic contradictions and repairing relations with the princes of the Central Plains for a long time, and as a result, he ignored the existence of the Chu people.

But King Chu Wen looked north stupidly, hoping that Zheng Guoren would come to repay his kindness. As time passed, the almost petrified King Wen of Chu finally found himself purely self-inflicted: the negative man in Xinzheng City was fighting with the Qi people, but he had completely abandoned his old benefactor. The Chu people couldn't help but be furious, and King Wen of Chu decided to do something to make the Zheng people have a longer memory.

Zheng Guo's crown princess Wen Qi has always been worried that her father will do something unfavorable to Zheng Guo, so she expressed her concerns to Li Gong through the crown prince. Only then did Li Gong remember that he had put the big creditor aside, and he realized the seriousness of the problem and immediately sent a mission to the state of Chu. But it was too late, and the Chu army had already rushed to Zheng with great momentum.

In the autumn, the Chu army surrounded and occupied Liyi, and after showing off its might in the city, it withdrew. King Wen of Chu used this operation to convey a message to Zheng Ligong: since the Chu army was able to capture Zheng Ligong's base camp and birthplace, it could also use Liyi as a base to attack Xinzheng and overthrow his rule.

Zheng Ligong was almost frightened and immediately sued the Chu people for peace. King Wen of Chu said that if Gong Zheng Li forgot the favor of the people of Chu so quickly, then he could consider finding another son with a good memory and sending that person to Xinzheng; And he didn't understand why the Zheng people should obey the leadership of the Qi State, because the Qi State would only favor the Song State and harm the interests of the Zheng State; But what the state of Chu could do was the opposite. King Wen of Chu asked Zheng Li to recognize the reality, distinguish who is a friend and who is an enemy, and not have illusions about Qi Guo.

This year was the beginning of the struggle between the Chu State and the Central Plains overlord against the Zheng State. Since then, whether it is Qi and Chu competing for hegemony or Jin and Chu fighting for hegemony, Zheng Guo has always been the primary object of competition among the great powers, and it is also the country that makes the overlords feel the most headache.

Zheng Guo is the Balkan of China, which makes Zheng Guo destined to become a country with frequent wars and disasters. Zheng Guoren lives on top of this huge powder keg every day, ready to go to the west at any time.

Due to the intervention of the Chu State, some people in the Zheng State began to move. Many of those people were sacrificed to the remnant party, and they were always afraid of Zheng Ligong's reprisals, hoping to overthrow his rule with the help of the power of the Chu people.

But they completely misunderstood the people of Chu, King Wen of Chu just wanted to teach Zheng Ligong a lesson, he couldn't just abandon a person in power who had spent more than ten years and huge financial resources to cultivate, and instead support a prince who didn't know the details at all.

As a result, the people of Chu secretly informed Zheng Ligong of the news. The people of Chu were vague, and Zheng Ligong couldn't figure out the specific characters of the rebellion, so he didn't dare to startle the snake.

Zheng Ligong has a brother named Gongziyu, a character man, who has been following Zheng Ligong for many years and has no heart, so he is the most trusted by his brother. Zheng Ligong thought that he could take this opportunity to eliminate the rest of the party, so he directed a big scene. He ordered his son to find Yongjie's widow (a teenage boy) in private, and instigated him to enter the palace to file a complaint against his father's enemy.

Zheng Ligong immediately accepted the accusation, and he ordered Zirenyu to set up an investigation team to thoroughly investigate the incident, and Zirenyu made a blacklist according to the size of Zheng Ligong's hatred with his political opponents, and then arrested the people on the blacklist one by one.

Some of those people were killed, some had their feet cut off. One of them, Gongfu Dingshu, was the grandson of Gongshu Duan, who fled to Weiguo because of the news (Gongshu Duan was expelled from Zheng Guo by Zheng Zhuanggong, but his son was recalled by Zheng Zhaogong).

Three years later, Zheng Ligong's anger had disappeared, and he considered that Uncle Ding's crime was not very serious, so he said: "You can't let Uncle Gong have no queen in Zheng Guo." And he called him back.

In this year, Qu Wo Wugong captured the capital, killed the Marquis of Jin, and dedicated all the treasures in the palace to King Zhou Xi. King Xi of Zhou sent Duke Yu to the Jin Kingdom and canonized the Duke of Quwowu as the Marquis of Jin with the order of an army. The Jin Kingdom ended more than 70 years of division and turmoil and regained unity.

In the seventeenth year of the reign of Duke Lu Zhuang (677 BC), the monarchs of Chen, Song and other countries went to Linzi to meet Duke Huan of Qi in accordance with the covenant. Zheng Ligong was afraid that the state of Chu would come to find trouble again, so he did not dare to go in person, but only sent a delegation to Linzi led by the doctor Zheng Zhan (Shu Zhan).

When the alliance began, the princes looked at Duke Qi Huan and then at Zheng Zhan, not knowing what would happen next. Qi Huangong's face turned dark, and he detained Zheng Zhan in a fit of rage.

Later, Zheng Zhan fled while the Qi people were neglected. He considered that he had not completed the mission assigned by the monarch and was afraid of bringing danger to the motherland, so he did not return to China, but fled to the country of Lu. A few years later, the people of Qi no longer pursued the matter, and Zheng Zhan returned to Xinzheng.