2. We should carefully understand the sense of power generated by strokes in the process of marching, and adjust the strokes for the purpose of expressing the quality of lines;
3. To express different feelings, such as slowness, fatigue and dryness, we need to grasp and adjust the turn of the pen.
4. In the process of writing, the center, the side wings and the exposed front part can be folded freely, and the pen can not fall down without lifting it. These can all be done by the pen tip.
5. So there will be various changes in the writing process of the pen tip. If the brush stroke is not adjusted in time, there will be oblique front, twisted front and scattered front, which will not only affect the line quality, but also bring many difficulties to the pen. Therefore, in the process of writing, we should always adjust the nib to make it reach the center pen.