What is the font of China's calligraphy in the world?

China's calligraphy, which has spread all over the world, is a running script font. Running script is a kind of calligraphy, which is divided into running script and cursive script. It is developed on the basis of regular script, and it is a font between regular script and cursive script, which is produced to make up for the slow writing speed of regular script and the illegible cursive script.