The issue of how much the novel borrowed from the author was not a violation of copyright was more complicated. Generally speaking, if the plot, characters, scenes, and other parts of the novel were all from someone else's work without the permission of the original author, then it might constitute copyright infringement. The number of references in the novel was not the key. The key was whether it violated the copyright of the original author. If the plot, characters, scenes, and other parts of the novel belonged to someone else's work and were borrowed without the permission of the original author, it would constitute copyright infringement. In order to avoid the problem of copyright, it is recommended to express gratitude to the original author and respect the copyright of the original author when borrowing from the novel. At the same time, in the process of learning from the novel, do not arbitrarily modify the original author's work, nor do you adapt the work to be completely different from the original. In addition, if you borrow from other people's storylines or characters, you can express them in your own language, but be careful not to violate the copyright of the original author.