Huang Ting: There is the Taoist classic Huang Tingjing, and the Jin people have the lower case Huang Tingjing. In the old days, there was an idiom to comment on calligraphy: "Writing Huang Ting at first is just right". Later, the metaphor was just right.
Spring earthworm autumn snake: metaphor for poor calligraphy, bending like the trajectory of spring earthworm autumn snake.
The sword has been drawn and the bow has been drawn. Describe the situation as tense and explosive. Later, it also refers to the vigorous and magnificent calligraphy.
For example, Zuo Qiuming wrote Chunqiu Zhuan, and summarized and explained the calligraphy of Chunqiu into several examples. Later, because of the classification examples, the style of the book was described as "draw inferences from one instance and draw inferences from another". See "Draw inferences from one instance". Penetrating the back of the paper: Originally, calligraphy was vigorous and powerful, but now it is also used to describe vivid and profound poems.