Time travel novels are a popular genre of novels that often explore human behavior and thoughts in different historical and cultural backgrounds. If you want to write a novel about time travel, you can consider the following aspects: 1. Set a unique space-time background: Different space-time backgrounds can create different cultures and histories to provide rich backgrounds and clues for the protagonist's story. They could explore different universes, parallel universes, or myths and legends to create a mysterious and attractive world. 2. Create a protagonist with depth: The core of a time-travel novel lies in the adventure and growth of the protagonist. The protagonist should have depth and personality to show his/her inner world and values. A charismatic protagonist could provide emotional resonance for the readers and also add persuasiveness and appeal to the story. 3. Exploring complex interpersonal relationships and human nature: Time travel novels often involve the exploration of interpersonal relationships and human nature. It is necessary to let the protagonist encounter various people and things in different time, space and cultural backgrounds to show the complexity and variety of human nature. Through the interaction between the protagonist and others, one could explore the good and evil, loyalty, betrayal, desires, emotions, and so on. Create an interesting storyline: The storyline of a time-travel novel is also an important element to make the storyline interesting and dramatic. They could create unique plots and characters, such as using the ability of the protagonist to solve historical problems, explore unknown cultures, or take risks. 5. Use innovative writing techniques: The writing techniques of time-travel novels are also very important. You can add freshness and appeal to the story by using innovative writing techniques such as non-linear narration, multiple narrations, reversed endings, etc. To sum up, writing a novel about time travel required a comprehensive use of many factors to create a unique space-time background, a deep protagonist, complex interpersonal relationships and human nature, an interesting storyline, and innovative writing techniques.