The reason why " Only Thirty " was called a floating drama was because its plot design was relatively floating. In the development of the story, the actions and motives of the characters were often not clear enough, lacked logic and rationality, and often contradicted each other, bringing a certain sense of confusion and incohesiveness to the audience. In addition, the characters in " Only Thirty " were flat and lacked depth and three-dimensional sense. Many characters 'personalities and behaviors were simple and difficult to leave a deep impression. In addition, the background music and setting of the show often seemed a little monotonous, lacking in cohesiveness and appeal, which also gave the audience a sense of suspension. The reason why " Only Thirty " was called a floating drama was because it had some problems in terms of storyline, character image, and plot design, which made it have certain characteristics and advantages compared to its peers.