I've been a little busy lately, and I've been delaying my writing, so I'm sorry!

I saw that some readers raised a lot of questions, and some of the comments were still very pertinent, and I accepted them humbly, and I am very grateful to these book friends for their care for this work.

I'm almost busy during this time, and I'm going to start writing again, and I want to finish the book.

However, considering that the suggestions of some book friends are very good, I decided to overhaul this book before posting, which may take some time.

Therefore, it is still necessary to let everyone wait for a while, and will revise the article as soon as possible, and strive to publish it as soon as possible to facilitate the reading of book friends.

I'm very sorry for delaying everyone's reading, and I'm sorry to say sorry to everyone.