Chen Changqing is a modern computer engineer who unexpectedly travels through time and ends up in a poor blacksmith's family in the Great Qian Dynasty. His parents, older brothers, and older sister treat him exceptionally well. However, his attempts to make century eggs, liquor, rock sugar, glass, soap, and other products all fail, leaving his family deeply in debt. Finally, driven by frustration, he decides to make firearms by hand, only to lose one of his legs in an explosion. Just as he is preparing to give up and live a quiet life, an unexpected disaster strikes: the prime minister's son falls during a struggle with Chen Changqing, hits his head against the edge of a well, and dies. Chen Changqing leads his family into hiding in Mount Taibai. There, he begins refining copper ore, making copper wire, and hand-winding copper coils, gradually bringing electricity into every household across the Great Qian Dynasty.