The following points can be used as a reference for novel authors to create a character who is both shrewd and cautious, and who chooses covert means to harm others. However, please note that this is purely a discussion of novel creation and does not constitute any real operation or encourage actual illegal behavior: 1. Personal expertise and background analysis The character's profession, expertise and past experience often determine which covert means he/she will choose. For example, a person with a pharmacology background is more likely to use poisons that are difficult to detect; while a mechanical genius may design equipment that "accidents" occur. By shaping the character's background, the means he/she chooses can be more reasonably explained. 2. Utilize environmental and social resources In novels, characters often use their familiarity with the environment to avoid risks. They may choose to create "accidents" in public places, or use chaotic scenes to make their actions less likely to arouse suspicion. In addition, characters may also use their interpersonal networks to cover up their true motives, or find reliable cover and "scapegoats". 3. Sophisticated risk assessment Behind carefully planned assassinations or harm, there are often calculations of various consequences. The character will consider whether the crime tools are easy to track, whether they will leave some unique traces, as well as factors such as the location and time of the crime. Understanding the investigative methods of the police or detectives in detail can help the character design a plan that is more confusing to the investigators. 4. Concealment and technical details of the means When choosing a covert method, meticulous technical considerations are often involved. For example: a. Poison selection: Choose those poisons that are easy to simulate natural death in medicine or cannot be quickly detected. You may also consider using slow-acting poisons to make the symptoms gradual, thereby confusing the timeline. b. Non-violent creation of accidents: For example, the equipment at the critical moment of the manipulation fails, causing traffic accidents or "accidental falls" to make people think that the victim was negligent. c. Psychological manipulation: Through long-term psychological suggestion and social exclusion, the target is self-destructed without anyone noticing, reducing direct traces of violence. 5. Plot contradictions and character conflicts In novel creation, relying solely on technical means is not enough. A three-dimensional villain often faces moral, emotional and inner struggles. Having characters weigh these internal conflicts when choosing specific means will make the story more three-dimensional and full of twists and turns. At the same time, if there is a detective or antagonist who keeps getting closer to the truth, it can also create tension and suspense in the story. 6. Matching with theme and style The choice of covert crime is not only a technical issue, but also needs to match the overall style, theme and reader expectations of the novel. For example, in a suspense novel, the intricate serial conspiracy and the details of the secret manipulation will shock the reader while keeping him interested; while in a literary novel, the covert means may be more reflected in psychological hints and delicate emotional narration. In short, in novel creation, if a character wants to hurt others in a covert way without being noticed, it must be carefully planned and carefully considered. From the background of the character, the use of the environment to the details of the crime and the subsequent counter-investigation, each link must be carefully designed to make the whole process both logically self-consistent and suspenseful and literary.