Viewing the Chinese history record, you will find the Tang Dynasty was the most glistening historic period in China’s history. Founded in 618 and ending in 907, the state, under the ruling of the Tang Emperors, became the most powerful and prosperous country in the world. Particularly, in this glorious period, the economy, politics, culture and military strength reached an unparalleled advanced level.
At the end of Sui Dynasty (581 – 618), the whole country fell into chaos due to the tyranny of Emperor Yang; rebellions roused by peasants were everywhere. Resenting Emperor Yang’s ruling, the chief officer of Taiyuan – Li Yuan, who was also known as Tangguo Gong (a vassal in Sui Court) raised an army in Taiyuan from May 617. In November of the same year, Li Yuan’s army captured the capital city Chang’an (currently Xian ) and put a new monarch, Yang You, on the throne as Emperor Gong. Meanwhile, Li Yuan proclaimed himself Da Chengxiang (prime minister) and Tang Wang (King of Tang). In 618 after Emperor Yang was killed by his chancellor, Yuwen Huaji, Li Yuan seized the chance to proclaim himself emperor and changed the state title into Tang, still with Chang’an as the capital city.