The two characters appeared repeatedly in the novel for the following reasons: 1. Portraying the character of the police officer Ochumilov: Ochumilov is one of the important characters in the novel. He is an experienced police officer with deep law enforcement ability and a sense of justice. The image of him wearing a military coat symbolized his professionalism and sense of mission. It also showed his rigorous, decisive, and law-enforcement characteristics. These characteristics are important elements of the characters in the novel. Through repeated descriptions, the readers can deepen their impression of Ochumilov. 2. Portraying the character of Khlyukin: Khlyukin is another important character in the novel. He is a colleague of Ochumilov and a senior detective. The close-up of his fingers might represent his professional skills and keen observation skills, but it also hinted at his personality traits such as determination, persistence, and fearlessness. By repeatedly describing Khlyukin's fingers, the readers could get a deeper understanding of his character. 3. provide clues for the plot development: the plot in the novel may revolve around these two characters. Their existence can provide clues and hints for the plot development. For example, Ochumierov's military coat and Khlyukin's fingers might represent the tacit understanding and cooperation between them or imply an unusual relationship between them. Repeatedly describing the images and characteristics of these two characters can help readers better understand the plot and character relationships of the novel.