Let's have a chapter today. When I came to Shanghai to participate in the authors' meeting at the starting point, I had a headache for those who did not save the manuscript. Coming so far, I was a little tired, and I was a little drowsy after writing a chapter.

The discussion was so enthusiastic, I was afraid that the quality of what was written in a hurry would be too poor. Keep up the good work tomorrow. Thank you. (To be continued.) )