The 24-character formula of well circle grid: horizontal and vertical, head high and feet long, middle palace tightened, left closed and right placed, upper strict and lower wide, symmetrical left and right.
Precautions:
1. Don't choose unfamiliar and difficult content.
2. Don't choose the same word with too much content. It is a good method to choose the theme in Chinese textbooks for primary and secondary schools.
3. Avoid conflicts between the content you choose and others, for example, try to avoid some familiar content.
4. Master the number of words. Generally, the text of A4 paper should be controlled within 160 words, so as to be compact and dense.
5. If there is a limited theme in the solicitation notice of the calligraphy contest, it is necessary to select the targeted content of the work, closely follow the topic and meet the requirements.