The official birth of the Chu State was marked by Xiong Tong, King Wu of Chu, proclaiming himself king.

The State of Chu was a vassal state during the Spring and Autumn Period and the Warring States Period, and its history can be traced back to the Western Zhou Dynasty. The ancestor of Chu State, Wu Xiong, had already defected to King Wen of Zhou when he was in power, and followed him to attack King Zhou of Shang. After King Wu of Zhou conquered Zhou, Xiong Yi, the great-grandson of Wan Xiong, was granted the title of Viscount and established the Kingdom of Chu in the fiefdom of Danyang.

The status of Chu State has always been relatively low until the emergence of Xiong Tong, King of Chu Wu. Xiong Tong was the seventeenth generation monarch of the Chu State. He longed to free the Chu State from its subordinate status among the princes and become the overlord of the world. Therefore, he actively developed military power, strengthened ties with various countries in the Central Plains, and continued to expand territory.

In 706 BC, King Wu of Chu sent troops to attack Sui State, which was then part of the Central Plains. Suiguo is a vassal state of the Zhou royal family and has certain strength. However, under the leadership of Xiong Tong, the Chu State quickly defeated Sui's army and captured Suihou. Xiong Tong proclaimed himself king and announced that Chu would no longer be bound by the Zhou royal family.

This event marked the independence and rise of Chu State, and also marked an important change in Chinese history. Prior to this, Chinese society had always been centered on the Zhou royal family, and all vassal states recognized the dominance of the Zhou king. However, as time went by, the strength of the various vassal states continued to increase, and the status of the Zhou royal family gradually weakened. The independence of the Chu State marked the beginning of a new stage in Chinese society. Various vassal states began to get rid of the shackles of the Zhou royal family and move toward independent development.

The impact of the official birth of the Chu State:

1. The Chu State became a powerful country in the south: The birth of the Chu State marked the emergence of a powerful country in the south, which affected the surrounding small countries. Had a great impact. In the subsequent history, the Chu State continued to expand its territory, controlled most of the south, and became an important power at that time.

2. Promoted the development of the southern region: The birth of Chu State promoted the development of the southern region. With the rise of Chu State, the economy, culture and other aspects of the southern region have been greatly developed. Especially in terms of economy, Chu State's commerce and handicraft industry have been greatly developed, promoting the economic prosperity of the southern region.

3. Posing a threat to the Central Plains region: The birth of Chu State posed a threat to the Central Plains region. The expansion of the Chu State in the southern region made the small countries in the Central Plains uneasy because they were worried that the Chu State would threaten their territory and security. Therefore, these small countries began to seek alliances with powerful countries in the Central Plains to jointly resist the expansion of Chu.

4. Promoted the development of Chinese culture: The birth of Chu State also promoted the development of Chinese culture. With the rise of the Chu State, the culture of the southern region gradually merged with the culture of the Central Plains region, forming a unique Chinese culture. Especially the poetry and music of Chu State had a great influence on later Chinese culture.