"Do what you should do" requires the author to be clear about what he should say when writing, regardless of pen and ink. For example, the background of an article, the ins and outs of a thing, the nature and characteristics of a thing, etc. If you are unfamiliar to the reader, you should make it clear and explain it clearly in the article, but you can't simplify it at will, which will damage the meaning of the article and lead to the defect of inaccurate carelessness.
"Stop at what you can't stop", that is to say, don't write one more word, but "cherish ink as gold". When you are in love, you are free and unrestrained, and you are unwilling to give up what you love. It is bound to be flourishing, lengthy and procrastinating, and even the problem of "writing a thousand words and pulling Wan Li" will appear.