King Ji Yu of Zhou Cheng (1055 BC - 1021 BC), surnamed Ji, name Chan, son of King Ji Fa of Zhou Wu, mother Yi Jiang (daughter of Lu Shang, Taigong of Qi), the second monarch of the Western Zhou Dynasty, reigned for 21 years. King Cheng of Zhou was young when he succeeded to the throne, and was assisted by Zhou Gongdan to pacify the rebellion of the three eunuchs. After the prince of Zhou Cheng took office, he built a new capital of Luoyi and Dafeng princes, and also ordered the Duke of Zhou to go east and compile ceremonial music, which strengthened the rule of the Western Zhou Dynasty. In 1021 BC, King Cheng of Zhou died at the age of 35.

During the reign of King Cheng of Zhou, he sealed the princes, strengthened the patriarchal ruling power, and implemented the idea of "prudent punishment with virtue" of the Duke of Zhou internally, and was pragmatic and frugal to alleviate class contradictions; It has continuously attacked Huaiyi and used force to control the ethnic minority areas in the east, and has achieved great victories. In addition, he also ordered the Zhou metric system to make music, planned various rules and regulations, and laid the foundation of the Western Zhou Dynasty. During the period of becoming a king, the society was stable, the people were harmonious, and the voices of praising the peaceful and prosperous times were endless.

After King Zhou Cheng fell ill, he was worried that his son Ji Zhao would not be able to handle state affairs, so he ordered Zhao Gong and Bi Gong to assist with his heart. Soon, Ji Yu died of illness, and Ji Zhao succeeded to the throne as King Kang of Zhou. Zhao Gong and Bi Gong led the princes to accompany Ji Zhao to the ancestral temple, told King Kang about the hardships of King Wen and King Wu's entrepreneurship, and warned him to be thrifty, diligent in political affairs, and keep the foundation of his ancestors. During the reign of Ji Zhao, he constantly attacked the ethnic minorities in the southeast, plundered slaves and land, and distributed rewards to princes and doctors.

The reign of King Cheng and his son King Kang, collectively known as the reign of Cheng Kang, was the prosperous period of the Zhou Dynasty. Later generations evaluated the political achievements of King Cheng and his son King Zhou Kang with the "rule of Cheng Kang", and the history said that the world was peaceful at that time, and there was no need for punishment for more than 40 years. Therefore, during the twenty-two years of his reign and the twenty-five years of the reign of his son King Kang, more than 40 years before and after, the Zhou Dynasty was socially tranquil and the people lived and worked in peace and contentment, becoming the prosperous era of the Western Zhou Dynasty, known as the "rule of Chengkang" in history.

Zhou Kang, Wang Jizhao (?) ―996 BC), surnamed Ji, named Zhao, grandson of Ji Fa, King Wu of Zhou, son of Ji Yu, King of Zhou, and third monarch of the Western Zhou Dynasty. During the period from King Cheng of Zhou to King Kang of Zhou, the world was stable, and no punishment was used for more than 40 years, which is known as the rule of Chengkang. In 996 B.C., King Kang of Zhou died in Haojing, nicknamed King Kang, and was buried in Biyuan. After his death, his son Ji Fang inherited the throne for 25 years of King Zhou Kang, in order to eliminate the border troubles, King Zhou Kang ordered Yu to lead a large army to attack the ghost side. The ghost side also mobilized troops to meet the battle. After two large-scale battles, the Zhou army killed more than 4,800 people from the ghost side, captured more than 13,000 people from its four leaders and below, and also captured many chariots and horses and a large number of cattle and sheep. The Zhou army expelled the ghost side to the west of Huanlong and Qi Zhou, far from Haojing. The northwest border of Zhou is temporarily safe. After two large-scale battles, the Zhou army, which had greatly increased its combat effectiveness, won a decisive victory, annihilating more than 4,800 enemies, capturing more than 13,000 people, and capturing a large number of wagons, horses, cattle and sheep, and other booty, so that the border was stabilized for a long time.

Ji Fang, the eldest son of King Ji Zhao of Zhou Kang. In the twenty-fifth year of King Kang (996 BC), King Kang of Zhou died, and Ji Fang ascended the throne as King Zhao of Zhou.

After the reign of Chengkang, the first time in China that was seen in the annals of history, the Western Zhou Dynasty should usher in a prosperous era, but at this time, the rulers of the Western Zhou Dynasty were "slightly lacking in the royal road". On the eighth day of the fourth month of the summer of the 14th year of King Zhao of Zhou (982 BC), an abnormal natural phenomenon suddenly appeared in Hojing, and the water in the river, well, spring, and pond rose at the same time, and the water in the well overflowed out of the well, and then the palace and the houses shook the mountains and rivers. At night, there are five colors of phosgene entering the constellation of the Purple Emblem, all over the four directions, all blue-red, and the sky is not visible for twenty-eight nights. The ancients believed that the celestial phenomena and the human world were the inside and outside, and the lack of royal roads led to the occurrence of visions.

If the so-called celestial phenomena are just superstition and ignorance of the ancients, then the attitude of King Zhou Zhao in dealing with state affairs is undoubtedly "the slight lack of royal road". In the autumn and July of the fourteenth year of King Zhao of Zhou, a coup d'état occurred in the state of Lu, and Ji Fei, the younger brother of Lu Hou, killed his brother Lu Yougong Ji Zai to seize the throne and proclaimed himself Duke of Wei. Such a great rebellion, King Zhao of Zhou actually let it go, neither sent troops to levy, nor raised teachers to ask for guilt, resulting in the phenomenon of bullying the weak in the world has occurred repeatedly, and the dynasty has deviated.

Dongyi is a general name for the various ethnic groups in the East in ancient times. In the early years of the Western Zhou Dynasty, these Fangguo tribes rebelled against the Zhou Dynasty. After the Eastern Expedition of Zhou Gong and King Zhou Cheng, Zhou's power reached the realm of present-day Shandong, but Huaiyi and Xu Yi were still stubborn. In that year, the Fangguo tribe led by Chu invaded the territory of the Zhou Dynasty, and King Zhao of Zhou gathered a large army to conquer Chu Jing in the south. In order to stabilize the rear, the troops first marched to the east. Seeing the disparity in numbers, the Yi countries submitted one after another. By the time of King Zhao of Zhou's invasion of Chu, twenty-six states in Dongyi and Nanyi came to submit to the court.

The Battle of Dongyi strengthened the Zhou Dynasty's control over the Dongyi states and isolated Jing Chu.