Workshop Owner in the Wasteland

A war brought the world to a near-destruction. Scientific development was cut in half. Humanity was almost extinct. The remaining people rebuilt civilization on the wasteland. This book mainly tells the story of a workshop owner who made a fortune by excavating ancient ruins and repairing ancient civilization artifacts including but not limited to washing machines, radios, hair dryers, etc. [Cyberpunk, steam elements, extraordinary elements... The introduction is weak, everything is subject to the actual content]