páo dáng Ji niú
My understanding of cows is an idiom in China, which means that after repeated practice, I have mastered the objective laws of things, and I can do things with ease and use them freely.
meaning
Dong: Chef. Ding is his first name. Solution: divide and rule. My technician dissected the whole cow. Metaphor after repeated practice, grasp the objective laws of things, do things with ease and use them freely.
source
Zhou Zhuang, a pre-Qin Zhuangzi health care master, said: "I am an expert in literature. I touch my hands, lean on my shoulders, walk with my feet, stand on my knees, and play with knives full of tenors."