The following things to note when writing a long science fiction novel: 1. Setting the story and setting: Setting the story and setting are very important when writing a science fiction novel. He needed to determine the time and place of the story, the future world and technology, the fate of mankind, and so on. These settings needed to have enough details and background for the reader to understand and imagine. 2. Create a rich character: The characters in science fiction also need to have enough depth and characteristics. It was necessary to create a unique personality and background story for each character so that readers could better understand and pay attention to them. 3. Grasp scientific details: Science fiction usually involves some technology and scientific concepts. You need to master the details of these concepts to avoid adding unrealistic or overly cumbersome details to the story. 4. Keep the story pace tight: Long science fiction novels usually need enough time to develop the plot and advance the story. Therefore, it is necessary to keep the story pace tight so that the readers can keep looking forward to the next development. Science fiction can explore many profound topics such as human nature, freedom, power, peace, war, and so on. He needed to integrate these topics into the story and delve into their impact and significance on human society. 6. Maintain literary value: When writing science fiction, you need to pay attention to maintaining literary value. Attention to detail, emotion, and character creation, as well as the use of appropriate language and style to present the story.