Lin Mo, a PhD in materials science, transmigrates by accident to Jiangdong at the end of the Qin dynasty, where he becomes an artisan on the run. Thanks to modern knowledge preserved through quantum entanglement, he improves bronze arrowheads in a workshop in Chu and recreates black powder, drawing him into the Xiang clan’s uprising against Qin. Faced with Qin’s iron cavalry and the Mohist school’s mechanical devices, he must combine the quantum effects of his carbon-fiber bracelet with Warring States ironworking techniques to build a military-industrial system two thousand years ahead of its time. When Xiang Yu’s double pupils see through the strange distortions of spacetime around him, the currents of history and the laws of science begin to collapse together. The clash between bronze civilization and quantum physics will rewrite the final chapter of the Chu-Han contention.