Dear book friends, this book is finally on the shelves, in fact, there are still a lot of feelings in my heart, since the university has opened a lot of books, on many websites have been posted, this is also the first book to be recognized, I am still a college student in school, in fact, writing books is just my own hobby, but now I am about to read a senior year, planning to take the graduate school exam, my dad has always asked me to concentrate on review, don't write books, but I still insist on reviewing, take out an hour or two of time code words every day, here to assure you, No eunuch, according to the original plan, the number of words in this book is about 2 million or more, so I hope to be able to get your support and companionship in the coming days. Of course, writing books is my hobby after school, and I won't beg for recommendations and rewards for monthly passes like those professional writers, but if you like it and think it looks good, just let it go with the flow and give some support! Finally, I would like to express my sincere gratitude to the friends who have been supporting this book!