I Build Black Tech from Scrap, but When the Country Calls, I Say, “Wait”

Urban superpowers / sci-fi / livestreaming / defending the homeland / interstellar war. A junkyard worker crafts black technology with his bare hands, face-slapping the world, becoming a livestream legend, helping Chinese technology overtake on the bends, rewriting humanity’s fate before an alien invasion, and prompting factions of all kinds to beg for cooperation.