What's my last name?

The expert refers to a chef named Ding.

Interpretation: I dissected the whole cow.

Moral: After repeated practice, the metaphor of "an expert in solving cattle" has mastered the objective laws of things, and is handy in doing things and using them freely.

Explanation: Dong: Chef, Ding is his name. Solution: divide and rule.

Who knows the origin of cattle:

1, taken from the original text.

The word "Niu Jing Jie" comes from the pre-Qin Zhuangzhou's "Zhuangzi Health Master": "Niu Jing Jie is a text, the touch of the hand, the leaning of the shoulder, the foot, the knee, and the sound of the knife are all in tune.

2. Interpretation.

There is a chef named Ding who specializes in slaughtering cattle. Wherever his hands touch, his shoulders rest, his feet step on, and his knees stand, he makes a sound of separation of flesh and blood, and the knife goes in, making a louder noise. All these sounds are not out of tune. In tune with the dance rhythm accompanied by Sang Lin and Jing Shou.

Refer to the above? Baidu Encyclopedia-Skillful Niu Jie