In addition to a large number of bamboo slips, Cao Zhang's masterpieces include the works contained in Urgent Chapter, Ode to a Teacher, Le Yi Post, Huang Xiang Urgent Chapter and Chunhua Pavilion Post. In the Yuan Dynasty, with the efforts of Zhao Mengfu and Song Ke in the Ming Dynasty, this calligraphy style was revived.
Although Cao Zhang is a cursive script, it is different from today's cursive script. It has established cursive script writing rules and has its own set of rules, which is the basis for Cao Zhang's writing to be accurate, easy to understand and beautiful.
(1) are not connected with each other, and the word spacing is even; (2) Flat and square, with fewer strokes and continuous painting; (3) They write according to the trend; (4) They change from round to arc and bend, which is convenient for turning the front; (5) The strokes conform to the official meaning, and the symbols are replaced with each other.
In the simplification of Cao Zhang graphics, there is another phenomenon, that is, simple strokes are omitted, adjacent strokes are connected, two strokes are turned into one, and even many strokes are connected into one. After omitting strokes, some strokes are symbolized, and in the process of convention, some rigid alternative symbols appear, which is very convenient to use and brings great convenience to writers. For the sake of brevity, some words even break the rule of writing from left to right and write directly from right to left. Nowadays, some font changes in Weeds come from Cao Zhang.