Mastering the basic brushwork of seal script is the most critical basic skill to learn seal script well. The basic brushwork of Xiao Zhuan should be summarized by "central pen". In other words, the main front of the pen must be in the center of the painting so as not to be exposed. It is characterized by hiding the head and protecting the tail, which contains strength, because the strokes written by the central pen are concise, powerful, round and beautiful, and have always been regarded as the main method of calligraphy.
The arc brushwork of seal script is the same as the previous horizontal and vertical strokes, which want to be right first and then left, and up and down first. The key is to keep the momentum of the circle, keep the depth of the pen and paper consistent and appropriate speed, and pay attention to symmetry. The two arcs are connected in the middle, and the joints should be written naturally without leaving traces.