Three thousand people, only six hundred bottles of oxygen left.

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In the year 3226 AD, crisis supply chain engineer Lin Jianxing is exiled to Scrapyard Planet K-19, a world on the verge of total oxygen depletion. Facing three thousand residents abandoned by the corporation, she accidentally awakens the "Reverse-Entropy Vault"—a system bound by the conservation of mass and energy—and reconfigures starship wrecks into oxygen valves, power grids, and defense facilities. From surviving alone to leading the populace in building the Spark Vault, she must fight off the overseer and corporate fleets within thirty days, uncover a dormant eco-mothership buried deep inside the planet, and forge the entire junk world into a starship bound for freedom.