Traveling Through the Sui and Tang Dynasties, Li Jiancheng's Eternal Wise King

As the youngest professor of literature and history at Yenching University, Li Cheng would come to the institute alone late at night to start his own whimsical thoughts. "If Li Jiancheng voluntarily resigned from the position of prince in 626 AD, would his ending be different?" "Want to know the answer?" A very rich voice came from a distance. "Who is it?" "The person who can bring you the answer - now go find the truth yourself!" So... I became Li Jiancheng? This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.