The Ups and Downs of History

Li Yichen, originally a graduate student in history, gained the ability to travel through historical dynasties due to field trips. Under the influence of this ability, he will expand his ambitions. In Qin, he helped four generations of kings realize their dream of consent. In the Tang Dynasty, he helped Tang Taizong Li Shimin complete the rule of Zhenguan, and beat the barbarians to flee. The Song Dynasty witnessed the peak of culture. In the Qing Dynasty, he died in the country and was in crisis This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.