In Song Dynasty (960-1279), there were some great calligraphy artists. The later generations call the best four "the Four of Song". But "the Four of Song" is already not the origional four. There was one of the origional four called Cai Jing. He was the premier minister of Song Huizong, a talent artist but a bad emperor, but he is a evil officer. So although his calligraphy was so good, people kicked him out of the great masters of the artists but count into his sinless nephew Cai Xiang. So today when we mention "the Four of Song" as "Su Huang Mi Cai", the four last names of the four artists, the "Cai" is not Cai Jing any more, it's stand for Cai Xiang.
The standard of Chinese arts is in a wide bound. But all these styles are based on the Tao, a branch of philosphy founded by Lao Zi which asked people to obey the rule by the universe and treat ourselves as a part of the nature. In Lao Zi's works, he mentioned the theory of empty. He said when a bowl or a room is empty, it can be used as a implement. So in a calligraphy works, the artist not only must draw the strokes in the proper place, but also must take care of the place he left be
Some topics in this essay:
, Su Shi
, Xizhi People