What kind of art is calligraphy?

Calligraphy is a highly abstract art, with lines as the basic expression language, which has strong generality and is the embodiment of emptiness. But at the same time, it takes Chinese characters as the writing object, and the ideographic characteristics of Chinese characters make it have realistic reference at the same time, which is the embodiment of reality. The combination of virtual and real calligraphy contains many factors of ancient philosophy, literature, music, painting and other disciplines, and the expression object is more unique, profound and profound.