The cost of promoting a novel depended on many factors, such as the popularity of the novel, the target audience, the method of promotion, and the resources invested. Generally speaking, the cost of promoting a novel could range from hundreds to tens of thousands of yuan. If the novel was more popular and had a large readership, the cost of promotion might be higher. More time, energy, and resources needed to be invested in advertising and promoting the novel to attract the attention of readers and get them to participate in the promotion of the novel. If the novel was less well-known or had a limited target audience, the promotion cost might be relatively low. He could promote the novel through various online channels such as social media, forums, blog, search engines, etc. to attract more readers. At the same time, he could also increase the popularity and influence of the novel through cooperative promotion and sponsorship activities. It was important to note that promoting a novel was a work that required continuous investment. It required constant attention to reader feedback and market trends to adjust the promotion strategy in time to effectively increase the popularity and appeal of the novel.