Zhang Zhi of the Eastern Han Dynasty, Wei Zhong of the Three Kingdoms Wei Dynasty, called Zhang Zhi the "Grass Sage" and "Zhong Zhang" together with Zhong Yao. It is said that he is "unparalleled and unparalleled" Zhang Zhi changed Zhang Cao into Jin Cao and was good at writing Fei Bai style. Zhang Huaiguan of the Tang Dynasty said: "Boying learned Cui Du's method, reviewed the old and learned the new, so he changed it to call it Jincao, and refined it. The style of the characters is made up of one stroke, with occasional discontinuities, but the blood flow is continuous." Today's people can There are as few as morning stars in writing modern chapters, and it is not easy to write good chapters. The modern grass mentioned here refers to the big grass, that is, the wild grass. Zhang Zhi's cursive script had a great influence on Wang Xizhi and Wang Xianzhi of the Jin Dynasty. Wang Xizhi perfectly combined the usability and artistry of calligraphy. His preface to Lanting and the Tao Te Ching are unique in the calligraphy world and he is known as the "Sage of Calligraphy".