I coded 2,000 words on the document, but I always feel that something is missing, since I think the inspiration and passion are a little lacking, I think, a book that can make everyone like it should not be able to do it by filling the number of words with strong code irrigation, and the content written should at least be worthy of every reader's subscription, rather than writing some casually like handing in the task, so, please let me be willful again this week, I will try to adjust it before next week.

I'm really sorry.

PS: Maybe the continuous interruption of the subscription is going to drop again, I hope you can give an understanding. (To be continued......)