I'm in Great Qin with Xiang Yu: Do You Still Dare to Fight with Your Back to the River?

Dong Yu transmigrates to the Qin Dynasty and discovers that the government of this era is rotten to the core. He resolves to reform it and breathe new life into the Qin. Drawing on his modern knowledge, he invents the steam engine, builds trains, and raises a powerful army. His reforms send shockwaves through the Qin Dynasty, and he becomes its enemy.