System: Who Said This Is Unreasonable?

The bicycle chain fell off, so you had no choice but to push the bike into the repair shop. When you watch the master repairing the chain, you are thinking, if you only know how to do this, you can repair it yourself if the chain falls off. So you start studying... "No, your screwdriver can even repair tank tracks?" "Tank tracks are also chains. I think it makes sense." Passersby thought it was outrageous. "This is outrageous. I have been working as a quality inspector for more than ten years. I can tell whether the quality is up to standard just by touching the envelope. I am familiar with it, you know?" Fang Yuan put down the screwdriver, this is outrageous, you haven't seen any others... This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.