Li Yuan was a promising emperor with outstanding achievements during the feudal period of China. He was also one of the most controversial emperors in Chinese history with mixed reputations and reputations. He established the hegemony of the Tang Dynasty that lasted for more than 290 years, and was praised by future generations for it; because he was unable to prevent his own flesh and blood from killing each other, he was helplessly "invited" to Danqi by his son Li Shimin, which made future generations lament and laugh.
