A modern history professor transmigrates into Zachary, the timid puppet emperor of the Great Qian Dynasty. Facing internal control by Empress Dowager Wilhelmina and the invasion of the Great Jin, he utilizes modern knowledge and technology to rescue renowned general Felix, promote innovations like mechanized looms, steam engines, trains, and tanks, gradually seizing control of the economy and military. Through strategies of "holding the world hostage"—dumping low-priced goods, manipulating finance, and demonstrating military might—he subdues seven states, crushes the Empress Dowager’s plots, defeats the Great Jin and its allies, unifies the land, and achieves an enduring imperial legacy.