He traveled through time and became Qin Shihuang's savior, but found that he had become the biggest 'variable' in the empire. I am Chen Yuan, a time traveler who can use equations to deconstruct war and use a scalpel to define life. When the Black Water Dragon Flag met the steam engine, when hundreds of schools of thought debated the cell theory, when the world map was marked with longitude and latitude for the first time... This is not history, this is a dimensionality reduction attack. But as I help the emperor conquer the visible lands, invisible enemies peer through the cracks in time. It turns out that the biggest cost of changing history is to awaken the backlash of history itself
