Cheng Yanqiu, a top student in the history department in the 21st century, accidentally traveled to Chang'an in the fourth year of Zhenguan. With his golden finger on "Zhenguan Politicians", he was involved in the rebellion of Prince Li Chengqian. In order to save his life, he disguised himself as a wandering Taoist priest and gained Li Shimin's appreciation through the prophecy of "Tui Bei Tu". However, because his proposal to "open the Maritime Silk Road" and "reform the imperial examination system" touched the interests of the five surnames and Qi Wang, he had to walk a tightrope between the pursuit of aristocratic families and the suspicion of the emperor. As he gradually changed the trajectory of the Tang Dynasty, he discovered that the time travel was no accident - the blood moon in front of the Xuanwu Gate was surprisingly similar to the quantum phenomenon of the laboratory explosion...
