Oracle Bone Inscriptions, Da Zhuan and Xiao Zhuan all belong to seal script. From Oracle Bone Inscriptions in Yin Dynasty to Xiao Zhuan in Qin Dynasty, the information about calligraphy is limited to inscriptions on bronze and stone. There is a big gap with the form of writing directly with a brush. There is no discussion about whether the brush was used in the pre-Qin period, just saying; So far, we haven't found the preserved materials of seal script written directly by brush at that time.
Because seal script is an early script, its basic strokes and brushwork are not as rich and complicated as official script and regular script that appeared later. As far as Xiao Zhuan is concerned, there are only three kinds of strokes: point, straight and arc. Taking Deng's works as an example, this paper introduces the basic strokes of seal script as follows:
1, point
There are few points in seal script, which are often connected with other strokes as part of them, or extend into short horizontal or short vertical. There are fewer separate points, which are written as follows; Write from the center of the point, rotate from left to right, and pick up the pen while rotating until it becomes a circle. However, Deng's points are extremely diverse, and the point treatment of the same word in the same work is different. See (Figure 1) the different ways to write the midpoint of the word "Tai".