1, Huai Su
Huai Su (737-799), a native of Lingling, Yongzhou (now Lingling, Hunan Province), was a calligrapher in the Tang Dynasty. He was famous for "Weeds" and was known as a "sage in the grass" in history.
2. Zhang Zhi
Zhang zhi (? -about 192), the word Boying, Han nationality, Guazhou County (now Jiuquan City, Gansu Province), a famous calligrapher in the Eastern Han Dynasty, was known as "the sage of grass" and "the father of cursive script". His calligraphy is known as "a book", and it is also called "the four saints in the book" with Zhong You, Wang Xizhi and Wang Xianzhi.
3. Zhang Xu
Zhang Xu (685? -759? ), the word Gao Bo, the word Ji Ming, was born in Wuxian County, Suzhou (now Suzhou, Jiangsu Province), a calligrapher in the Tang Dynasty, good at cursive writing and fond of drinking. He is called "Zhang Dian" by the world, "Wu Sizi" with Huai Su, "Wu Sizi" with He, Zhang and Bao Rong, and "drinking" with whom. His cursive script is similar to Li Bai's poems and songs.