Counter-Entropy: Repairman from Wasteland to Galaxy

In the wasteland for three hundred years, civilization rusted into ruins. Lu Chen, a low-level coolie in the wasteland, accidentally awakened the brain-computer interface device "Prometheus" that had been sleeping for three hundred years. This vicious-tongued instructor commented on this: "The host is illiterate and disabled. This is the worst start I have ever seen." Starting from repairing scrap metal, it forced him to dismantle the old world and reconstruct machines - handmade mother machines, fusion reactors, and starships. When they walked out of their home planet, they discovered that the elites who escaped three hundred years ago died in the middle of the starry sky; and the repairmen from the bottom of the wasteland repaired the Galaxy Avenue. Hard-core science fiction, no fantasy, no supernatural powers, no intelligence reduction, technological upgrades, rigorous logic, not brainless and cool writing