All Humans Shrink 100x — But I Built a Tiny Army First

A mysterious and merciless Earth reboot sweeps across the globe in one silent night, overturning billions of years of ecological order and completely rewriting the rules of human survival. Overnight, every living human on the planet undergoes a terrifying involuntary shrinkage, reduced to tiny palm-sized creatures no bigger than a thumb. The world that once belonged to humanity is instantly turned into a deadly wild jungle. Ordinary trivial insects mutate into towering ferocious monsters with overwhelming biting power, common sky birds evolve into swift and brutal aerial predators that patrol the skies for prey, and ordinary terrestrial mammals balloon into gigantic behemoths that roam the land like ferocious prehistoric dinosaurs. Humanity, once the invincible ruler standing firmly at the top of the global food chain, plummets helplessly to the very bottom, fragile, vulnerable, and trapped in a desperate survival hell. Against this catastrophic backdrop, Gu Chen gains a precious chance of rebirth, returning to exactly one month before the terrifying shrinkage apocalypse arrives. He carries the painful and bloody memories of his previous life, where his greedy and cold-blooded ex-wife betrayed him cruelly and butchered him in the chaotic miniature world, abandoning him to a miserable death. Having tasted the ultimate cruelty of human greed in doomsday, he makes up his mind firmly—this time, he will show absolutely no mercy to his betrayers. He wants no redundant romantic entanglements and indulgent harems, focusing solely on survival and self-protection. Gu Chen acts decisively and efficiently to prepare for the coming disaster. He sells all his houses and storefronts to cash out all his assets, investing over two million funds to customize a full set of premium aluminum alloy micro survival gear. His complete equipment arsenal includes impenetrable micro shelters, flexible micro helicopters, durable micro off-road vehicles, defensive micro tanks, lightweight micro combat armor, lethal micro guns, as well as sharp micro swords and sturdy shields. Every piece of gear is fully functional and tailor-made for the palm-sized survival world. He owns no luxurious spaceships or high-powered fighter jets. What he has is a full arsenal of palm-sized combat vehicles and weapons, a loyal soulmate Xia Zihan who takes the initiative to chip in 200,000 for their survival preparation, and a precise doomsday countdown that marks every second before the catastrophe falls, letting him stand ready to confront the brutal rebooted world.