When I woke up, the world's coal mining technology had regressed ten thousand times, and mines became black holes that swallowed lives. When the alarms of excessive gas and roof collapse rang through the Houcun Coal Mine, and the dispatch room was in chaos, the inconspicuous book clerk Ye Fan raised his head from the corner - he carried the memory of the miners for ten years and became the only light in this dark age. By operating pumps, regulating pressure, and reinforcing supports, he used his forgotten knowledge to resolve the disaster and rose from a transparent man to a technological savior. And all this was just the beginning. When the fire of technology rekindled the deep well, the gears of fate had already turned for him.