Alien Arrival: I Became a God by Picking up Trash in the Wasteland

My sister was critically ill from radiation, and I was forced into the death zone. When I was about to die, an alien metal fragment pierced my palm! "The [God-level technology system] is activated! By scanning the scraps, can you unlock all the black technology blueprints from genetic repair fluid to Star Destroyer?" At the beginning, synthesize the gene potion from the garbage dump and resurrect with full health on the spot! While others were still fighting for a mouthful of water and a piece of bread, I broke down all the waste materials of an entire medical fleet and turned them into my own resources! What? That heavy-duty engineering mecha that everyone regarded as a mountain of scrap metal that even the predators didn't bother to look at was actually a "god-level treasure to be repaired" in the system? ! Fix it! Missing parts? I can print! Lack of energy? I just pulled out a military-grade nuclear battery! From then on, there was a rampaging steel giant in the wasteland! Dare the local ruffian "Sand Wolf Gang" collect protection money? One step turned into a discus! The regional overlord "Blackstone Group" sent mecha troops to conquer? My electromagnetic gun and self-destruct drone are already thirsty! While the survivors are still lingering in the ruins, my underground base has become a self-sufficient mechanical oasis, with water purification circulation and soilless cultivation! All my friends have meat to eat! All my enemies will not even leave ashes behind! From a low-level scavenger to the king of the wasteland with an army of mechas, I thought I was at the top of the world. Until that day, I parsed out a chilling instruction from the wreckage of a crashed alien reconnaissance ship: [Target planet G-137, execute the 'cleanup' protocol...]