My Great Qin Will Not Be Allowed to Perish

Since the end of the three kingdoms of Wei, Shu and Wu, the wars in the world have never stopped. The short Western Jin Dynasty was just a more chaotic transition period, and people often ignore a "small" dynasty that lives in a complicated way. After continuous efforts, the territory gradually expanded and expanded, that is, the former Qin "Empire". Fu Jian, a small factory employee, accidentally traveled to this era. He was even more interested in the Battle of Feishui, where 800,000 vs. 800,000 People were defeated by fewer people. He also wanted to know the story behind it. As a time traveler, can Fu Jian change the fate of the Battle of Feishui?