As the longest-serving prime minister in the Tang Dynasty, Li was cautious. He has unique views in politics, economy and military affairs, has a good talent in system design, and is quick and courageous, so he has been appreciated and valued by Xuanzong. His reform has certain positive significance. Even after the An Shi Rebellion broke out, Emperor Xuanzong of the Tang Dynasty still thought that Li was excellent, and did not think that Li was the chief culprit of the An Shi Rebellion.

Although Li monopolized power, blocked speech, excluded talents and promoted Hu Jiang, he was also responsible for the decline of the Tang Dynasty and left a bad reputation in history, but we must recognize his political ability and outstanding achievements, that he is a very cautious and prepared person, and that he shines. Li Yisheng was cautious and methodical, with a unique political vision and rapid ruling ability, which was highly valued by Emperor Xuanzong of the Tang Dynasty. However, he monopolized power, rejected talents and cracked down on dissidents, which led to the disorder of military discipline and became a fatuous minister.

Li is a famous traitor with two faces, but he is also a talented person. Although Li was a big traitor around Tang, he also heard about his crimes. However, since Emperor Tang Ming realized that Li Bai was a poet with no political talent, he must have seen the advantages of Li. Li was a great man in the prosperous Tang Dynasty. Only he can control the generals, including An Lushan. For a time, Li made the social contradictions extremely wonderful and intense. After Li's death, An Lushan took advantage of the emptiness and corruption in the Tang Dynasty to launch a mutiny. Of course, the emperors of the Tang Dynasty were also responsible. Ignorance and incompetence in employing people are the fatal wounds of any emperor in feudal society, so we can't just blame Li, Yang or An Lushan.

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