Misplaced identities, distorted information, and little people telling the truth are used as public tools for comedy such as great wisdom; all characters, companies, plots, and lines are all original. Moreover, the stage has been moved from the office building to the factory, and the twists and turns throughout the book are all in the manufacturing scene (the wrong version of the drawing is sent, the 8D report is regarded as a whistleblower letter, and the person who can't speak the least in the factory inspection lottery is selected). The book contains an outline of 140 chapters in five volumes (blank→rough machining→finishing→grinding→assembly, the processing process is a metaphor for promotion)
