Is Kan Zhijing's calligraphy valuable?

It's worthless Kan Zhijing's calligraphy is worthless. If the price is not expensive, it is a Confucian classic, which is a Confucian classic. In ancient times, "Jing", that is, Jing Shu, refers to books as the standard of thought, morality and behavior. , also known as books on religious teachings, or monographs on certain things. Subdivided into: Taoist scriptures, Confucian scriptures and Buddhist scriptures.