The imagination was the author's imagination and creativity to expand his thinking into unprecedented fields and situations. The most important factor in writing a book was not the size of the imagination, but the attractiveness of the story and the ability to create characters. In the process of writing a book, the author needed to constantly tap into his imagination and creativity to expand his thinking to a broader field and situation. This required constant exploration and innovation, as well as the analysis and study of existing literary classics and masterpieces for reference and inspiration. The most important thing was that the author had to believe in his own creative ability and imagination, and firmly believe that his work could resonate with and be loved by the readers. The size of the brain hole was just a tool. The ultimate goal was to create excellent works and let the readers feel the fun and value of it.