After repeated practice, I have mastered the objective laws of things, and I am comfortable in doing things and using them freely. From "Zhuangzi, Master of Health": "I understand the cow for the text, touch it with my hands, lean on my shoulders, walk with my feet, squat on my knees, and play with a knife, all of which are alto."

Zhuangzi, also known as Nanhuajing, is a Taoist scripture written by Zhuangzi and other scholars in the middle of the Warring States Period. After the Han Dynasty, Zhuangzi was honored as a real person in the south of the Yangtze River, so Zhuangzi was also called a classic in the south of the Yangtze River. His books, Laozi and Zhouyi are called "San Xuan". Zhuangzi is a treasure in China's ancient books, which has an unparalleled position in the history of thought, literature and philosophy, and has a far-reaching and extensive influence on later generations.