One-time pass is a free gift of the calligraphy book you said, and it is also a separate book, and the printing quality is also very good. As a teaching aid for synchronous practice, one-time pass has a good reputation. If it is five or three books, there are not many copies in the main book now. It is not a separate book. It is not convenient to practice once a day. After using these two teaching AIDS, it is more economical and convenient to repeat them if you compare them.