There were a few points to note when writing a mystery detective novel: Creating a unique detective character: A detective character needs to have a unique personality and characteristics to leave a deep impression on the readers. For example, they could be smart, witty, calm, decisive, or have a sense of justice, responsibility, and so on. 2. Create an exciting storyline: Suspense detective novels often need to create an exciting storyline for the reader to guess and reason during the reading process. The development of the plot needed to be reasonable, logical, and at the same time, there needed to be enough suspense and surprise. 3. Use rich description techniques: Suspense detective novels need to use rich description techniques such as appearance description, psychological description, language description, etc. to portray the detective character and the reader's psychological state. The description needed to be vivid and vivid to resonate with the readers. 4. Set up reasonable puzzles and clues: A mystery detective novel needs to set up reasonable puzzles and clues to let the reader think and reason during the reading process. The setting of the clues needed to be reasonable, hidden, and multi-clues. At the same time, it needed to echo the plot to make the readers have more guesses and doubts. 5. Create a fascinating villain: The villain of a mystery detective novel also needs to be created very well, so that the reader will be curious about it and even become a part of the story. The villain could be a cunning and intelligent criminal, or a mysterious person or organization. To write a mystery detective novel, one needed to pay attention to the plot, characters, descriptions, and puzzles to make the readers resonate and think while reading. At the same time, one needed to maintain uniqueness and creativity to make a deep impression on the readers.