The Rebirth of Li Jiancheng Through the Sui and Tang Dynasties

As the youngest professor of literature and history at Yanjing University in the imperial capital, after completing his daily teaching tasks, Li Cheng would often stay alone in the institute to think about a seemingly insignificant question: If Li Jiancheng had abdicated the throne in 626 AD and devoted himself to assisting Li Shimin, would his ending have been different? "This kind of problem still needs to be practiced before we can know it." "Who is there?" "I am the system, and my mission is to take you back to that era to find the answer you want." "So... What are the characteristics of your golden finger?" I will appear from time to time to give you a little surprise. You will know when you go there, and oh, by the way, you may also meet old friends. ""Who? Which friend? Ah----! " "So... I became Li Jiancheng? " This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.