" Dub Son-in-law " was an online literary novel. The performance and humorous style of the supporting characters added a lot of fun and comedy to the entire story. The following are some possible reasons: 1. A green leaf with red flowers: As a green leaf, the supporting role is usually more ordinary than the main character, but it is precisely because of their ordinariness and interest that they can set off the brilliance and importance of the main character. The humor and wit of the supporting characters could add color and a relaxed atmosphere to the entire story. 2. Character setting: Some supporting characters 'personalities and settings are humorous in themselves. For example, some absurd and funny characters' actions and conversations often make people laugh. In addition, the characters of the supporting roles could also be more relaxed and interesting. For example, some son-in-law, village girl, silly roe deer, etc. Their performance and dialogue often made people laugh. 3. Plot Requirement: Sometimes, the performance of the supporting characters is also to meet the needs of the plot. In some tense stories, the humor and wit of the supporting characters could ease the tense atmosphere and make the whole story more relaxed and interesting. 4. Deliberate Humor: Some authors will deliberately let the supporting characters show some humorous elements to enhance the comedy effect of the entire story. This kind of humor was often more deliberate, but it could also attract the reader's attention and interest. The reason why the supporting characters were so funny in " Duty-husband " was because they were ordinary but interesting as green leaves and red flowers; the character setting was relaxed and interesting; the plot needed to be deliberately humorous, and many other reasons worked together.