Datang: Starting from the Suppression of the Anshi Rebellion

In his previous life, he was a special soldier + military doctor named Li Cheng. His soul penetrated into the body of Tang Prince Li Yu and became the grandson of the famous emperor Li Longji in history. The Anshi Rebellion broke out, and the Tang Dynasty was crumbling under the iron hooves of the rebels... Li Yu, who has a modern soul, absolutely cannot tolerate Li Longji's mediocrity and Li Heng's incompetence. Since neither of you can do it, why not give up the throne in advance and let me be the emperor? I will extend the life of the Tang Dynasty for another three hundred years!