Apocalypse: Building a Star Destroyer from Scratch

On the 108th day of the apocalypse, zombies besiege the city, and the flame of human civilization is about to be extinguished among the ruins of steel. The Federation's Supreme Command issues a final order to cleanse the entire city with orbital ion cannons, including Chu Ge's squad still fighting desperately to break out. One second before the bombardment, Chu Ge awakens the [Interstellar Military Industry] template. Using scrap metal scavenged from the ruins, he hastily assembles a prototype of a Star Destroyer's main cannon. One shot pierces the atmosphere, the ion cannon disintegrates, and the entire fleet falls like rain. From then on, the human faction gains a cheat more terrifying than zombies. While survivor bases fight over half-expired canned food, Chu Ge stands at the starport dock, gazing at the blueprints of a Star Destroyer with a total keel length of three kilometers, deep in thought: The Empire's fleet arrives in the solar system in three days, and his hull is only thirty percent welded. — Description from novelcodex.org