The book notes referred to the notes taken when reading books, which could record important information, thoughts, feelings, and questions in the book. Reading notes can help us better understand and master the knowledge in the book, deepen our understanding of the content in the book, improve our reading efficiency and memory. There were many types of reading notes, including notes, annotations, mind maps, and so on. Excerpt referred to the recording of important information or keywords in the book for future reference and review. Taking notes referred to organizing and categorizing the contents of the book so that they could be better understood and remembered. Annotated was to explain the contents of the book in detail to help one better understand the contents of the book. A mind map referred to the process of organizing and categorizing the contents of a book to form a clear mind map for future reference and review. Reading notes were not in a fixed format. They could be written in different ways according to different reading methods and purposes. Reading notes can help us better grasp the knowledge in the book, deepen our understanding of the content in the book, improve our reading efficiency and memory.