During the Warring States Period, the seven more powerful states were Qi, Chu, Yan, I-Ian, Zhao, Wei and Qin, also known as the "Seven Powers of the Warring States Period". Because of its reforms, the State of Qin soon became the strongest one. In 221 BC, the State of Qin finally unified the entire China by defeating all the other six states in the past ten years.
The Han Dynasty included the Western Han Dynasty (206 BC-25 AD) and the Eastern Han Dynasty (25—220), which lasted for more than 400 years. In the history of the Western Han Dynasty, the most famous emperor was Liu Che (156—87 BC), or Emperor Wudi of the Han Dynasty. He created the most prosperous period of the Western Han Dynasty, making the Han Dynasty one of the strongest countries in the world at that time. The strength of the Han Dynasty made the Chinese people no longer known as "Qin People, but as Han People”.
After the Eastern Han Dynasty, Chinese history entered a long period of division: Wei, Jin, and the Southern and Northern Dynasties. The Sui Dynasty reunited China in 589, but it soon perished. It was succeeded by the Tang Dynasty (618—907). In the early Tang Dynasty, there were peaceful periods known as “The Rule of Zhenguan” and “The Kaiyuan Age of Prosperity”.
After the demise of the Tang Dynasty, Chinese history entered a period of division — the Five Dynasties and Ten Countries. Zhao Kuangyin, a general of the Later Zhou Dynasty, used military power to seize the throne and established the Song Dynasty in 960. He was called Emperor Taizu of the Song Dvnasiy (Song Taizu).
Before the Yuan Dynasty, although some ethnic minorities entered the Central Plains and established their own regimes, they never ruled the whole of China. At the beginning of the 13th century, there were seven regimes or regions in China: Mongolia, Western Liao, Western Xia, Jin, Dali, Southern Song and Tubo.
