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Celestial bodies fall to the ground, causing doomsday catastrophe. Extreme climate, radiation mutation, zombie craze, underground giant beasts, human cannibalism, alien colonization... Yang Chen was reborn and returned to the beginning of the apocalypse, with only 24 hours left before the disaster struck. Fortunately, he brought back the system developed in his previous life and opened his own doomsday refuge, which can be upgraded and evolved infinitely: Steel door → titanium alloy door → energy defense shield → space wall... Machine gun defense tower → Gatling position → Land short-range gun → Gauss rail gun... Biological laboratory → Circular ecological park → Military science fortress → Floating city... When everyone was struggling to survive in the face of the disaster, Yang Chen was already standing at the top of the food chain, looking down at this children's paradise-like apocalypse...

There are thousands of perfect human bodies, but the only interesting bionic soul is Lin Yang. After traveling through time, I accidentally discovered that not only was I no longer a "human", but I also became a suspect in the laboratory explosion accident... Omnic, bionic, human; War, kinetic armor, magic equipment technology... "In a world disguised as peace by technology and bionics, humans may lose their instinct to find light in the darkness... But bionics will not." Lin Yang promised

In the Internet age, the privacy you think is safe is no longer a secret. During an unexpected onboarding test, Fang Yu got an unexpected database. When the entire network's data is exposed, what will you do with it? Fang Yu said: omniscience is justice...