The style depends on whether the calligrapher's words and deeds are consistent with China's traditional philosophy, such as the Confucian doctrine of the mean and the Taoist doctrine of nature. This is not only the temperament of life, but also the style of calligraphy. Generally, a person's knowledge, culture, temperament, morality, self-cultivation and so on can be reflected in calligraphy. Of course, you should fully understand the philosophy in China's traditional culture. Without this foundation, it is impossible.
The second measure: technical difficulty coefficient
The quality of words depends on the texture of lines. For example, many people imitate or even fake, but experts can see it at a glance. Especially his thin lines, no one can imitate them completely, because it is very difficult to write. Whether a word is wonderful or not depends on whether there are "words". Every word has words, just like a poem has poetic eyes. "eyesight" lies in that little change.
Li Guanlun, a master of calligraphy, mainly uses running script and cursive script, and his price trend is uncertain, but according to a friend, it is generally between 3000- 15000, depending on his calligraphy works, which is closely related to his teacher.