How does calligraphy spread?

The so-called brush stroke is the skill of using a pen. The center runs the pen hard, presses the pen, and spreads it out. This kind of brushwork gives people powerful brushwork, which is flesh and blood.

In contrast, it is wrapped in the front.

Wrapping the front: it is a pen-lifting skill opposite to the pickaxe, that is, when the pen is started, the front of the pattern enters the paper (facing the person), and then the pen runs. In the process of lifting the pen, some spread out, that is, spread out, and some continue to twist (at this time, the pen rotates naturally in the hand as needed), so that the stippling written will have the feeling of sinking and mud pods.