Sign in the Biological Mecha at the Beginning, Detonating the World

When Chen Jin returned from rebirth, the system informed him: "Sorry, the turbulence of time and space has caused the system that should have awakened twenty years later to arrive early." Staring at the countdown to the end of the world with only 60 days left, he coldly locked onto the secret base of Yinghai Kingdom. Sign in on the first day to get a god-level gene potion, and unlock the future technology tree on the tenth day. While other countries are still reeling from the virus outbreak, he has personally led a mecha team to land in Yinghai. "This time, I will nip the apocalypse in the bud." But just when he thought he had a chance to win, the system suddenly alerted—— "Warning: Unknown signal detected on the seabed, the truth of the apocalypse is not a virus..."