Alien Invasion? Let Me Teach Emperor Qin Shi Huang to Build Mechs First

My name is Lin Jie. I was born during Earth's Cataclysm Era, the darkest age in history. Earth faced five civilizations, each vastly more advanced than our own. Under the threat of catastrophe, all we could do was steal and survive.

We stole starship and mech blueprints from the Galactic Civilization, stole the anti-scientific arts of alchemy and cultivation from the Cultivation Civilization, and infiltrated the Insectoid race, paying a terrible price for their genetic technology...

But even so, Earth lost. I died in battle during Earth's final defensive war. As an ace mech pilot, a cultivator who had reached the Void Refinement and Union with the Dao stages, and the last commander of the Dragon Void Corps, I died on my homeworld.

But even I never expected to transmigrate, carrying a System, back to the time before the Cataclysm. The farmhouse restaurant at my home, connected to a steel mill, began receiving one strange guest after another. I knew my chance to change everything had arrived.

An alien invasion? No need to panic. Just give me a moment to teach Qin Shi Huang how to build mechs, Wei Zheng of the Tang Dynasty how to slay dragons, and Wang Xizhi how to paint talismans and trace the Dao. I'll teach Zheng He what it means to have a starship that can sail all the way to Andromeda without ever going down...

This novel and its characters are entirely fictional. Any similarities are purely coincidental. Please do not imitate.