Calligraphy theory is a theory about calligraphy, which is a general understanding that can include its particularity.
However, there are two different interpretations on this most definite issue, broad and narrow.
The so-called book theory in a broad sense refers to all the words related to calligraphy works, such as calligraphy history, calligrapher, calligraphy evaluation, calligraphy appreciation, calligraphy skills, calligraphy creation, calligraphy inscriptions and inscriptions.
Calligraphy theory in a narrow sense only refers to a technique of calligraphy creation, that is, the so-called "creation theory" in popular parlance. Its contents generally include post selection, copying, writing, stippling, writing, typesetting, creation and so on.
Because the book theory in a broad sense covers a wide range, what we are going to talk about here is mainly based on the book theory in a narrow sense, but sometimes it is also to illustrate the problem and occasionally involves some other aspects. Once the problem is clarified, we will get down to business.