Zhou Wuwang Ji Fa is not an only child. He also has several younger brothers, the most famous of which is Sansi. The name of the third brother is Ji Dan, and the name of the fourth brother is Shuangji. In order to consolidate his political power, Ji Fa (Zhou Wuwang) gave titles to his two younger brothers. Ji Dan, the third son, was named Duke of Zhou, and Shuangji, the fourth son, was named Zhao Gong. And let Taigong be the boss of eastern Shandong, that is, the king of Qi. Let the third brother Duke of Zhou be the boss of Luxi, that is, the king of Lu, and let the fourth brother Zhao Gong be the boss of Hebei, that is, the prince.
Not long after, our Zhou Wuwang Ji Fa died young because he was busy with government affairs for many years. His son continued to be king, that is, Zhou Chengwang. Zhou Chengwang is still a child, and he can't handle state affairs. Therefore, Cheng Wang's uncle, his third brother and Duke Zhou were temporarily invited to help the government. During the period of auxiliary administration, Duke Zhou carried out a series of reforms, stipulating that sons should listen to their fathers and courtiers should listen to the king. Because it was the Duke of Zhou who stipulated the etiquette norms, later scholars all thought that Duke was very powerful and knowledgeable. Gradually, it is said that he can interpret dreams. Therefore, the duke of Zhou's reputation is great.
Later, when Little King Zhou Chengwang grew up, Duke Ji Dan of Zhou returned the throne to Zhou Chengwang. Later intellectuals thought Duke Zhou was as great as Zhuge Liang, so they all admired and respected him.
When the Duke of Zhou was idle and bored, he also summarized the gossip invented by his father Zhou Wenwang and Ji Chang and developed it into sixty-four hexagrams, which is the Book of Changes.
Generally speaking, Zhou Wenwang is his father, King Wu is his second son, Zhao Gong is his fourth son, Duke Zhou is his third son, and Taigong is Zhou Wenwang's good friend. Later, the Zhou Wenwang family and the Taigong Wang family were married for generations. Marry each other.
Above.