Ten years after Zheng Wugong, Zheng Wugong married Wu Jiang, the daughter of Marquis Shen, as his wife. Wu Jiang gave birth to Prince Yusheng, because of the difficulty of childbirth, and after giving birth, she did not like Yusheng at all.

After a few years, he gave birth to his younger son Uncle Duan, Uncle Duan was born very smoothly, Wu Jiang loved him very much, when the brothers were together, Wu Jiang was biased towards the younger son Uncle Duan, but this is also very normal, as the saying goes: the lifeblood of the old son's eldest grandson and grandparents.
Twenty-seven years later, Duke Wu fell ill. Wu Jiang blew the pillow side wind to Wu Gong, wanted to make his younger son Duan the prince, don't see that Wu Gong is sick, but he is not confused, abolishing Chang Li is not a joke, if you don't get it right, it will cause national turmoil. Duke Wu did not agree to his wife's request.
Soon, Duke Wu died, and Yu Sheng succeeded to the throne, that is, zheng zhuanggong, who was famous in the history of spring and autumn, known as the "little overlord of spring and autumn".
In the year of Zheng Zhuang's reign, he sealed his younger brother Duan to Jingyi and became known as his uncle.
Ji Zhong said, "Jingyi is larger than the capital of the Zheng Kingdom, and should not be given to my brother." Zhuang Gong said: "My mother wants to seal it like this, I am a filial piety son who cannot disobey."
At this time, a minister said to Zheng Zhuanggong: "When is the Jiang clan satisfied!" It is better to deal with it as soon as possible and eliminate the hidden dangers in the bud, if you wait until the forces grow, it will be very difficult to do, let alone your beloved brother? ”
At this time, Zheng Zhuanggong said a famous saying that is still constantly quoted to this day: "Many acts of injustice will kill themselves"!
Due to Zheng Zhuanggong's concessions and the support of his mother, Shu Duan became more and more bold, and did not take Zheng Zhuanggong in his eyes at all, and after arriving in Jingyi, he repaired his weapons, trained soldiers and horses, and plotted with his mother Wu Jiang to attack Zheng Du.
Twenty-two years later, Shuduan did indeed send troops to attack ZhengDu, and Wu Jiang responded in the city.
In fact, everything Uncle Duan did was in the hands of Zheng Zhuanggong, he had already planted eyeliner in Jingyi, and Zheng Zhuanggong knew every move of Uncle Duan.
Duke Zhuang was no longer patient and decided to send an army to attack Shu Duan, who lost the battle and fled back to Jingyi.
Duke Zhuang continued to attack Jingyi, and the people of Jingyi betrayed Shuduan, surrendered the city, and Shuduan fled to Yanyi. Yan Yi was also unable to resist Duke Zhuang's army, and Shu Duan fled to Gongguo.
Zheng Zhuanggong was a small overlord in the Spring and Autumn Period, and his reign was also the highlight of Zheng Guo's history, although it was only a flash in the pan, he opened the prelude to the Spring and Autumn Struggle for Hegemony.