It's over, my four years of college life...... I completed the defense the day before yesterday, and yesterday I had a casual meal with my roommates, and then took graduation photos, and now I am waiting for the official graduation in June.

As for this book, for various reasons, it was not finished, and I owe you an explanation to the book friends who subscribed, and I am sorry here.

The new book, which I had prepared in April, had been discussed with the editor, and planned to wait for the dissertation defense to be published, and now it was time to fulfill the promise.

"Playing Martial Arts with the System" is over! (Testimonial) is playing in the hand, please wait a while,

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