At the end of each chapter, Qingfeng will put some bad jokes, small jokes, and practical methods that he has seen or heard on the Internet. Add some fun to everyone.

This is my first time writing this book, and I hope you will give me more suggestions and comments.

In terms of writing, because my culture is not very high, I am more tolerant.

Really sit in front of the computer and start coding words, only to know the author's hard work, ask for a collection, give me the motivation to persevere.

I promise not to be a supervisor and keep updating.