Sanguobi means that Nabi has three twists and turns. Tang Ouyang Xun's "Eight Secrets": "One wave often has three strokes." Chen Yizeng of the Yuan Dynasty "Hanlin Essentials·Yuanfa": "There are three strokes in the three strokes, like the ups and downs of water waves."
In fact, This comes from an ancient calligraphy theory: "The key to writing calligraphy is to write calmly. Even between a stroke and a stroke, the stroke must be passed three times before it can be called Dharma calligraphy. A little bit of writing is as small as corn, and it is also divided into three strokes. You must have the tendency to tilt your back."
The basic theory of brushwork is that "every point and every stroke has three turns; every wave and stroke has three folds." No matter how short the strokes are, they must be "crossed three times" to create a "pitching back". Under the guidance of this theory, ancient calligraphers conducted in-depth and detailed analysis and research on the beginning, line and end of a stroke, and proposed a set of fairly complete brushwork theories.
Central strokes require a center. The so-called center is what Cai Yong of the Han Dynasty said in "Nine Movements": "Let the center of the pen always move in the dot painting." Center strokes are not easy. It has to overcome two difficulty.
The method of closing the pen is the same as starting the pen, which is to increase the movements that are oblique, vertical and opposite to the direction of line movement. The purpose is also the same. On the one hand, they enrich the changes in shapes, so that triangles, squares, and circles complement each other; on the other hand, they perfect the rhythm of the potential, so that the straight potential energy is slowly released by the diagonal arc (side front), and is Cut off by vertical cuts (square brushes) and wrapped by reverse folded brushes (round brushes), the pointillism shapes open and close, forming various contrasting relationships and producing strong visual effects.