Global Cataclysm: I Have a Doomsday Tank!

One week later, an apocalyptic disaster occurred across the world. Tsunami crisis, ice age, super earthquake, volcanic eruption, electromagnetic storm, underground creatures, alien invasion... Huan Feiyu traveled back to a week ago and activated the doomsday chariot system. Facing the coming catastrophe, Huan Feiyu began to build his own doomsday chariot. Simple food cultivation room→staple food growing room→vegetable plantation→fruit garden→farm→seafood breeding pond... Cold weapon manufacturing bench → Firearms workbench → Exoskeleton mecha manufacturing room → Steel suit manufacturing hall...... Crossbow launcher → remote control rifle launcher → three-barreled machine gun turret → Gatling gun turret → artillery turret → laser ray tower → star destroyer cannon... Ordinary car → Heavy armored vehicle → Three-defense all-terrain vehicle → Mobile fortress → Floating castle → Star destroyer... When people are hiding in shelters and shivering and can only eat dried earthworms, But I found myself outside, simmering mutton and eating hot pot, still humming a tune. Ps: The full text is a post-apocalyptic survival text. If you don't travel through time, you won't be the Virgin. This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.