Li is a famous figure in the history of Tang Dynasty. His reputation is not because he is well-governed, virtuous and brilliant, but because he is an authoritarian, playing with the trick of "paying lip service but not paying lip service" to realize his monopoly on political power. During the more than ten years of Li's autocratic power, Li Tang's politics became increasingly dark and various contradictions were sharp, and the prosperous era of Kaiyuan quickly evolved into an economic and political crisis at the end of Tianbao. Li was in the reign of Emperor Xuanzong of the Tang Dynasty for 65,438 years.