I'm really embarrassed, because of the pressure of family and work, I can't continue to write this book. The baby is one year old, and I have too little time with him, and I am very responsible as a father. In addition, the job position has just been adjusted, and I work overtime every day, so I really don't have time to continue writing. In recent years, there has been no time for writing. I'm afraid I'm going to say goodbye to my readers. Writing books part-time is really tiring. I hope you will be more considerate. (To be continued......)