Zhang Xu, a native of Wu (present-day Suzhou), was born and died in the years of Kaiyuan and Tianbao in the Tang Dynasty. Guan Jinwu has a long history and is known as Zhang Changshi. Zhang Xu is most famous for cursive script, but he has carefully studied regular script, which has been passed down to this day. The exquisite regular script laid the foundation for the formation of Zhang Xu cursive script.
Among the cursive writers in the Tang Dynasty, Zhang Xu was the first person to write a new style. His wild grass style was praised by Han Yu, a writer in the late Tang Dynasty, as anger, embarrassment, sadness, joy, resentment, hope, drunkenness, annoyance and injustice. If you move in your heart, you will write a cursive script.
Zhang Xu's wild grass calligraphy is to melt feelings into words, and his works are strange in the middle, continuous in the middle, rapid in ups and downs, and the spirit and line echo each other.
Zhang Xu's "Weeds" and Li Bai's poems and songs in the Tang Dynasty, Pei? Sword dance is called the three unique skills. Zhang Xu once taught Yan Zhenqing brushwork, and Yan Zhenqing's evaluation of Zhang Xu's cursive script is: Zhang Changshi's posture is detached and beyond. So it's called Zhangdian.
Huai Su was another famous cursive writer in the Tang Dynasty after Zhang Xu, a native of Hunan. He became a monk as a teenager and loved calligraphy since childhood. Huai Su studied calligraphy hard, and then left Hunan for advice in Luoyang, Henan and Xi 'an, Shaanxi, in order to make progress in the wild grass.
Huai Su likes drinking and writing when he is drunk. His words are like a whirlwind, flying around, and his words have changed a lot without losing his brushwork. At that time, after reading Huai Su's Weeds, Xu Yao praised him for being drunk and writing two or three lines of letters, but he couldn't write a book when he woke up. Therefore, people later called Huai an alcoholic.