Li Longji, Xuanzong, was born in Luoyang on August 5th, Wuyin Day (September 8th, 685) in the first year of Hanggong. He is a wise and decisive man, versatile, knowledgeable, good at calligraphy and handsome. Xuanzong acceded to the throne and changed to 7 12, with a congenital year number. Later, it was changed to Kaiyuan, another day, and abdicated in 756. In the 45 th year of his reign, on April 5, the second year of Shangyuan, Jiayin Day (May 3, 762), Emperor Xuanzong of the Tang Dynasty collapsed in the Shenlong Hall at the age of 78, and his ministers went to see the Great Sage, Daming Filial Piety. When Li Longji was born, it was when Wu Zetian became the queen, so when he was a child, he went through a complicated portrait axis of Li Longji.
The court accident may have helped him to form a firm character. When he was a child, he was very ambitious. He called himself "Aunt" in the palace. Although not valued by the ruling Wu, his words and deeds are still very opinionated. When he was seven years old, the court held a sacrificial ceremony. At that time, General Wu loudly reprimanded the attendants and guards. Li Longji immediately glared and shouted, "This is the court of the Li family. What is it to you? " ! How dare you scold my knight guard like this! "Looking at the child wu dumbfounded. When Wu Zetian learned this, she didn't blame Li Longji this year, but fell in love with Xiao Gaozhi's grandson. In the second year, Li Longji was made king of Linzi County.