Sun (646 ~ 69 1) was a calligrapher and calligrapher theorist in the Tang Dynasty in China. Honesty is what you say. Wu Jun was born in Fuyang (now Fuyang, Zhejiang) and Liu Chen (now Kaifeng, Henan). You Zhouwei once joined the army and led government clerks to join the army. Ambitious, liberal arts and ancient. He is good at regular script and running script, especially cursive script. He is a student of Wang Xizhi and Wang Xianzhi, and his brushwork is very strong, which is very suitable for these two kings. He wrote the score of two books, which has been lost. The Preface to the Book Spectrum is divided into six parts: tracing the source, distinguishing the style of the book, evaluating the title, describing the brushwork, admonishing the scholar and hurting the confidant. It is profound and concise, and occupies an important position in the history of ancient calligraphy theory. These arguments are many, such as the three stages of learning books, the combination of five good and five in creation and so on.
Huai Su (725-785) was born in the Tang Dynasty. His name is Zangzhen, and his monk's name is Huai Su. His common surname is Qian, Han nationality, and he was born in Lingling, Yongzhou (Hunan). A good Buddha at an early age made a monk. He is the leader of a generation of coquettish cursive scripts in the history of calligraphy. His cursive script is called Crazy Grass, and his pen is round and powerful, which makes it turn into a ring, unrestrained and smooth, in one go, just like Zhang Xu, another cursive writer in the Tang Dynasty, who was called "Zhang Dian crazy" or "Zhang Dian drunk".