Doomsday Countdown: First, Let Me Build a Tech Empire

[Reborn] [Hard Science and Technology] [Exploring the Stars] [Interstellar War] Reader's Note: There is no technology that appears fully formed out of nowhere. The technology tree follows the fundamental laws of reality, and the golden finger only accelerates development. In 2048, an asteroid strike wipes out Blue Star civilization. Lin Feng, wounded in battle, returns to 2013 with memories of the apocalypse. In this life, he gives up a quiet retirement and travels everywhere recruiting top talent, making breakthroughs one level at a time in solid-state batteries, controlled nuclear fusion, and materials for interstellar ships... When news of the impending apocalypse spreads, various factions try to use academic appointments to bring him to heel. He sends them packing with a small Martian city. In the blink of an eye, a massive fleet carrying billions of people lifts off from Jupiter's orbit to escape the catastrophe.

When humanity's fleet returns to the solar system once more: "You, the one who threw that rock back then! Is your neck ready for the chopping block?"