What part of a web novel made you realize that the author's professional knowledge was not up to standard?

As a fan of web novels, I won't provide an answer on whether a web novel author's professional knowledge is passable. However, as a reader, I sometimes notice some problems with the author's writing skills and professional knowledge. Here are some possible examples: 1. The author lacks the necessary historical knowledge: If an online novel author lacks the understanding of historical events and characters, his writing may lack accuracy and cohesiveness, and readers may feel confused and unnatural. 2. The author's lack of professional knowledge: If a web novel author lacks professional knowledge in the relevant field, he may make mistakes or express himself unclear in his writing. For example, he might confuse science and magic in science fiction or underestimate the complexity of historical events in historical novels. 3. The author's writing style and language usage are inappropriate: An author's language usage and writing style can reflect his professional knowledge and writing experience. If his language was too easy to understand or too professional, he might make mistakes in his expression or fail to attract enough readers. An author's professional knowledge can affect his writing skills and the quality of his works. Therefore, readers should pay attention to his works and try their best to raise questions and criticisms in the process of reading in order to help the author improve.