In 697 BC, Zheng Ligong's plan to assassinate the powerful minister Ji Zhong failed, and fled to Liyi, and the Duke of Song zhuang joined forces with allies to escort Zheng Ligong back to China, after which Zheng Ligong stayed in Liyi with the protection of the Song State and sought the opportunity to return to China.
In 682 BC, Zheng Guoquan's courtier Jie Zhong died. The death of Ji Zhong brought fierce turmoil to the State of Zheng, and the State of Qi also believed that the Sacrifice Zhong was dead and that zheng Guo had no one, and immediately sent troops to interfere in Zheng's internal affairs. At this time of turmoil, Zheng Ligong, who was in exile, was also keenly aware of his own opportunities.
In 680 BC, Zheng Ligong attacked the State of Zheng, attacked the Great Tomb, and captured Fu Feng, the Grand Master of the State of Zheng. In order to save his life, Fu Feng said to Zheng Ligong: "Spare my life, I can help you kill Zheng Zibao and welcome you back to China to restore your position." Zheng Ligong swore an oath with Fu Feng and let him go back. In June of the same year, Fu Feng killed Zheng Zibao and his two sons to welcome Zheng Ligong back to Zheng Guo, and Zheng Ligong returned to Zheng Guo from Liyi to re-ascend the throne. After Zheng Ligong regained the throne, he killed Fu Feng. Some people wondered why Zheng Ligong killed Fu Flaw, who had meritorious service to him, and Zheng Ligong said: "Although Fu Flaw has merit for me, he is a person who has two hearts for the monarch, and a courtier who can betray the monarch with the intention of living should not be killed?" "It seems that there is no good end to being a traitor, and this has become a classic for the killing of traitors."
In the winter of the same year, Zheng Ligong participated in the Youdi Alliance held by the Duke of Qi Huan, which provided Zheng Guo with a better diplomatic environment. In the following years, Zheng Guo has been cultivating and living. In 675 BC, the State of Yan and the State of Wei joined forces with King Hui of Zhou's uncle, Prince Hui of Zhou, to attack King Hui of Zhou, who fled to Wenyi, and the two states of Yan and Wei established Prince Hui as king. King Hui of Zhou complained to Zheng Guo, but Zheng Ligong did not succeed after mediation, so he attacked the State of Yan, and then attacked The Prince of Yan without winning, so he first took King Hui of Zhou back to the State of Zheng and let King Hui of Zhou live in Liyi.
In 673 BC, Zheng Ligong gained the support of the State of Yu, and the two countries attacked The Combined Forces attacked Prince Hui of Zhou, and Zheng Ligong carried King Hui of Zhou into the capital of the Zhou Dynasty, killing Prince Hui and his henchmen, and Li Le set up a banquet to entertain King Hui of Zhou. Because of the merits of King Zheng Guoqin, King Hui of Zhou rewarded Zheng Ligong with the Land of the Zhou Dynasty east of Hu prison pass.
After the death of Zheng Zhuang, the state of Zheng was in chaos for more than twenty years, during which five monarchs were changed, the State of Song and the State of Qi took turns to interfere with the State of Zheng, until Zheng Ligong was restored again, and finally stabilized the State of Zheng through diplomatic means, to help King Hui of Zhou restore the throne, gain territorial expansion and prestige among the nations, and the State of Zheng finally got rid of its previous decline and showed the dawn of rejuvenation.