Li Mo, a top student in the history department, accidentally traveled to the Qin Dynasty to save a child. The "knowledge base" brain that you carry with you (no physical system, relying entirely on memory), and a strategic vision that transcends the times.
He tried to change the way the Qin army fought through technological innovation (agriculture, military industry), but was involved in the power struggle between Lu Buwei and Ying Zheng, as well as the assassination conspiracy of the dead soldiers of the Six Nations. **(Note: This story is an imaginary history, and some plots are artistic processing. Please do not completely correspond to the real history.)**