What is the relationship between the four elements of calligraphy: pen, structure, composition and brushwork?

Zhao Mengfu said: "Calligraphy is based on using a pen, and writing is labor. The word Gaijie has been circulated from time to time, and it is not easy to use a pen through the ages. "

The pen and structure are for a word.

The composition is aimed at the final appearance of the work, and the composition in running script and cursive script is extremely important.

The law of ink is the change of ink color. In traditional Chinese painting, ink is colorful and heavy, so is calligraphy. The shade and dryness of ink color are important parts of calligraphy.