To write a serial novel online, you can follow the following steps: 1. Create a novel website or social media account. For example, Qidian Chinese Network, Xiaoxiang Academy, Red Sleeves Adding Fragrance, and other platforms all provide a serial function. 2. You can register an account and create a novel. You can choose the type, theme, style, etc. of the novel on the platform. 3. After completing the novel, submit the work to the platform and wait for approval. 4. After the review, upload the main body of the novel and the additional content, and set the serial time and update frequency. 5. Set up a reader feedback mechanism to respond to readers 'messages and comments in a timely manner to improve reader interaction. 6. Start to serialize the novel and update it on time every day to keep the story compact and the readers 'feedback positive. 7. Build a fan base and interact with readers to collect readers 'suggestions and feedback to improve the quality and attractiveness of the novel. The above were the basic steps of writing a serial novel online. The specifics still needed to be adjusted according to the platform's requirements and one's own writing style.