What is the combination of calligraphy and etiquette?

Calligraphy and etiquette together are called book ceremony. The word "book ceremony" consists of two words: calligraphy and etiquette, in which calligraphy refers to writing words with a brush or pen in a specific artistic way, which has aesthetic value and practical function; Etiquette refers to the norms and principles of civilized manners. Combining these two words together, Li Shu means that certain etiquette norms must be observed when writing, such as writing in block letters, correcting posture, and not allowing words to be distorted at will, so this word is usually used to refer to the requirements of calligraphy cultivation and etiquette.