Official script

1. Originally refers to the unique style of Yan Zhenqing’s calligraphy. Song Zhaoji's "Xuanhe Shupu·Yan Zhenqing": "But he is loyal to the day and has knowledge of the world, so his spirit can be seen in the expression of calligraphy and ink, which is unique and comprehensive... The later secular studies are to seek the end of their appearance, so as to It is said that "silkworm head and swallow tail" are just obtained; I never knew the beauty of using a cone to draw sand, and the person whose mind is clear and has good nature cannot be discussed." Later, "silkworm head and swallow tail" was generally used to refer to people who were not good at practicing facial expressions and stele inscriptions. The resulting disease pen. Song Mifu's "Haiyue Famous Sayings": "There is no silkworm head or swallow tail in the original calligraphy. It has the spirit of seal script and Yan Jiesi's calligraphy with Guo Zhiyun's "Struggle for Seats"."

2. Describe calligraphy. The starting stroke is solemn and the finishing stroke is light and quick.

3. It is a metaphor for the horizontal strokes of official script and the horizontal strokes of strokes. When the brush is raised in a long stroke, the back edge is raised, shaped like a silkworm's head; when the brush is closed in a horizontal wave, the stroke is raised diagonally, shaped like a wild goose's tail.