In the 24th year of Kaiyuan, Li won the political struggle with Zhang Jiuling, taking its place as the secretariat, which opened the stormy days before the "An Shi Rebellion" in the Tang Dynasty. Li reigned for 19 years and won the trust of Tang Xuanzong. He was the longest-serving prime minister in Kaiyuan and Tianbao years.

After Li took power alone, he tried his best to exclude those whose fame and talents were higher than himself. On the surface, he honeyed people, but secretly, he plotted to frame them. At that time, the world called him "a sword with honey in its mouth."

In the second year of Li Renzai, he framed three people, including Prince Li Ying, and Li Ying was abolished by Emperor Xuanzong of the Tang Dynasty. He was soon executed. Another year passed, and Emperor Xuanzong of the Tang Dynasty made Hengli a prince. Li didn't play any role in the establishment of the Prince, fearing that he would be left out in the cold after the death of Emperor Xuanzong of Tang Dynasty, so he tried to abolish the Prince. He launched a series of unjust cases against Heng Wang. For example, in the first month of the 25th year of Kaiyuan, he falsely accused people of colluding with frontier generals and exiled them, and by the way, he let the concubine Webster of Prince Ying be abolished and killed his political opponent Li.

In the eleventh year of Tianbao, Li, our prime minister, came to an end. His confidant Wang Hao was implicated in the rebellion of his younger brother Wang Han, and Li was also implicated. Although he was not convicted, Tang Xuanzong's political balance began to tilt towards Yang. 10 month, Li got sick. 1 1 month is seriously ill. No, he died in Huaqing Palace. After his death, Yang and others framed him for rebellion, deprived him of all his official positions, confiscated his property and exiled his family. Li was not buried, but was buried with his present.