The most important thing to improve one's writing skills was to keep practicing and trying to write different types of novels and constantly reflect on one's shortcomings. Besides, reading was also an important way to improve one's writing skills. You can read all kinds of novels, including classic novels, modern novels, science fiction, etc., and learn writing skills and techniques from them to continuously improve your reading ability. He could also read some writing books such as Fiction-Writing Workshop, creative writing, and a writer's toolbox. These books could provide some writing skills and methods to help him improve his writing skills. Finally, he could also participate in some writing classes or workshops to share his experiences and exchange ideas with others to gain more inspiration and help.