Ouyang Qiming, a doctor of modern history, woke up and found that he had become the famous general Meng Tian of the Qin Dynasty, leading an army of 300,000 to build the Great Wall in northern Xinjiang. Thinking of the tragic ending of Meng Tian and his son Fusu in history, as well as the death of the second generation of Qin Dynasty, he broke into a cold sweat. In order to survive, and for the iron-blooded era that he once loved so much, Meng Tian decided to change his fate against fate. Using knowledge beyond his time, he improved agricultural tools, found new crops, developed military technology, and built an invincible iron army. He fought wits and courage with Zhao Gao, Li Si and other traitors in the court, and fought with the Huns royal court in northern Xinjiang. What he wanted to do was not only to find a way out for himself and Fusu, but also to inject a shot in the arm into the huge and nascent Great Qin Empire and create an unprecedented prosperous Great Qin with his own hands.