1. Era background: In the third year of Qin II (207 BC), around the time of the Battle of Julu, the Qin Dynasty was experiencing internal and external troubles (Zhao Gao was dictatorial, Hu Hai was ignorant, and the princes rebelled against Qin), and history was heading towards a key point of "the demise of Qin and the rise of Han".
2. Dual protagonist setting:
- Xu Jia: A college student in the Department of Modern History. He traveled through time and became Li You, the governor of Sanchuan County in the Qin Dynasty and the son of Li Si. He carries the "History Rewriting System" with the goal of supporting Ziying and saving the Qin Dynasty. He is good at using historical knowledge to lay out the layout.
- Liu Yuan: A student in the Department of Modern Archeology, he lived on the streets of Xianyang after traveling through time. With his flexible mind and ability to observe ancient society, he became an ally of Xu Jia. He is good at intelligence gathering and psychological tactics.
3. Core conflict: Relying on Li You's identity and Liu Yuan's market network, the two time travelers dealt with Zhao Gao, Hu Hai, Xiang Yu, Liu Bang and other forces in the torrent of history, trying to subvert the historical destiny of "Qin must perish".
