A classic China joke says, "You must have a plan before you do something."

Everything is prepared, and if it is not prepared, it will be wasted. If you make a decision before speaking out, you won't hesitate (jiá cheek, tripping, here means "argument"); If you decide in advance, you won't be sleepy; If you decide to go again, you won't feel guilty (Ji, something is wrong); If you decide the way ahead, you will not be poor. -The Book of Rites? doctrine of the mean

Vernacular Chinese: Everything can be successful if it is prepared in advance, and it will fail if it is not prepared. Be prepared before you speak, and you won't be unreasonable; If you are prepared before doing things, you will not encounter difficulties and setbacks; If you are prepared before you act, there will be no mistakes and regrets; As for clarifying a truth (establishing a theory), it is even more necessary to make great efforts to make careful preparations so that there will be no problems.

The core of this passage is the word "Yu", which says that anything can be successful as long as it is prepared in advance, and it will fail if it is not prepared, and expounds the importance of "Yu".