What is the essence of calligraphy that can't be discussed with pen and money?

The so-called pen-centered, in fact, is the method of using a pen with a vertical nib. The point is to wrap the nib in a brush. In the process of pen running, the pen tube should be rotated to draw long lines, so as to keep the pen tip straight. The advantage of using a pen in the center is that the pen does not come loose and the lines are round and powerful. When the center writes with a pen, he should appreciate the sense of resistance and keep ready. When the pen rotates and provokes, the pen hides the front, the meaning remains unchanged, and the gas is endless, which makes the chest reverberate. In fact, the center's pen is expensive in a Chinese character, and the strength is stored in a fraction. The front is eight sides, and the winger is properly rotated to maintain the strength of the pen. Otherwise, you will get tired of the pen, and the line ink will look dull and lifeless. Center and winger use pens.