(Signed for publication, so read with confidence.) Modern engineer Li Wei is unexpectedly reborn as a Mohist disciple at the end of the Warring States period. With technology and historical insight far beyond his time, he helps Qin Shi Huang complete the unification of the realm. From improving weapons and building highways to standardizing weights and measures and designing the Great Wall, he accelerates the course of history with technology, all while preserving the light of humanity amid the whirlpool of power. This is an epic woven from technology and political intrigue, telling how modern wisdom can forge an enduring legend in an ancient age.