Emperor Xuanzong of the Tang Dynasty was a famous traitor in Li Longji. Good temperament, no talent, quick change, good at gaining. Born in the imperial clan, he is the great-grandson of Li, the brother of Li Yuan's uncle. It was a thousand cows (court guards). At the beginning of Kaiyuan, he moved to Prince Zhongyun. Soon, through the relationship between his uncle and his uncle, he was promoted to Guo Zi Company. In the 14th year of Kaiyuan (AD 726), he moved to Imperial College and was transferred to the Ministry of Punishment and Assistant Minister of Official Department. At this point, he has become one of the supreme rulers of Li Tang. At that time, he was a special darling, and Li tried to please and flatter.