My understanding of cattle comes from Zhuangzi, which was later used by Zhuangzi to describe the principle of keeping in good health.

Knowledge expansion:

1. My owner is Wen Zainiu. Wen Huijun, who stood by, praised: "The craftsmanship of slaughtering cattle can be so exquisite!"

2. I put down my knife and replied, "I am pursuing the truth of killing cattle, which is better than skill." A good cook changes a knife every year, because he uses it to cut meat, and the knife becomes dull after a long time. An ordinary skilled worker needs to change his knife once a month, because before long, he will cut bones with a knife.

My knife has been used for 19 years, and thousands of cows have been solved, but the blade seems to be newly sharpened. You know, there is a gap in the middle of the joints of cattle, but the blade is not thick. It must be feasible to take a blade with no thickness, pierce it between the cracked bones and swim around it. Because of this, 19 years have passed, and my blade is as good as new. "

4. Wen Huijun sighed: "Well, I have heard my master's words. I have to stay healthy!"