Zhang Huaixuan, a famous calligrapher in Tang Dynasty, is introduced in detail. Thank you.

Zhang Huaiguan (date of birth and death unknown), a native of Hailing, Yangzhou in Tang Dynasty, mainly lived in Xuanzong and Suzong periods of Tang Dynasty. Zhang Huaiguan was appointed as an official of Ezhou Sima and imperial academy, and Cao Jun, a government soldier, joined the army. He is good at calligraphy, calligraphy and cursive script, boasting that calligraphy is "more dangerous and more subtle than calligraphy, and the grass wants to walk alone for a hundred years", but unfortunately the handwriting does not exist. Zhang Huaiguan is also a famous book critic, and he has written The End, Yi Shu, Shu Yuan and Treatise on Medicine Stone. "The End" consists of three volumes. The first volume lists ten styles, such as ancient prose, big seal script and essays. It praised the source and made an incisive debate on various calligraphy styles. The middle volume and the second volume are divided into three categories: spirit, wonder and ability. They include 86 ancient calligraphers, each with a series of biographies, and 38 others in the biographical appendix, which is an important calligraphy monograph. There is no volume in Book Theory. It was written in the first year of Gan Yuan (758), and its contents include four aspects: righteousness, conduct, seal and cursive script. There are 19 calligraphers, such as Cui Yuan, Zhang Zhi and Zhong You, whose evaluation criteria are "on talent, writing before ink", which has a great influence on calligraphy criticism in later generations.

Zhang Huaiguan was an outstanding calligrapher and theorist in the prosperous Tang Dynasty. Kaiyuan years, because of the title of the book was recruited as a sacrificial Hanlin. He first received an official and part-time salary in Youfu, and then received the salary of Sima Shengchuan, but he didn't actually take office. In the first year of Gan, it was interpreted as Ezhou Sima. Zhang Huaiguan entered the official ranks from the eighth grade, and finally from the fifth grade. Zhang Huaiguan's father, Zhang Shaozong, is good at calligraphy. In Shu Duan, I talked about my father's calligraphy: learn high first, then learn Chu Suiliang's brushwork, and then change my mind. Zhang Shaozong's last official position was Shaozhou Wugang county magistrate. In the Theory of Six-body Calligraphy, Zhang Huaiguan also mentioned that his brothers Zhang Huaixuan and Zhang Huaixuan were also good at calligraphy: "My brother and I are in love and dedicated to each other. I would like to enter the book with eight points of Xiao Zhuan, the book is true, and the cursive script is combined into six bodies. " Zhang Huaiguan was born in an official's family, and he was good at the truth, line, cursive script, seal script and eight-part essay in calligraphy. In Liu Ti Shu Lun, he argued that truth and deeds "can be compared with Yu (Shinan) and Chu (Sui Liang)", and cursive writing "only took hundreds of years". Zhang Huaiguan left behind a rich and complicated book history and monograph. Only Shu Duan, Guan Shu, Yi Shu, Wen Zi, Liu Ti Shu Lun, Ten Techniques of Using Pen, Forbidden Sutra in Yutang, Calligraphy Review and Medicine Stone have been handed down from generation to generation. There is also a volume "The Ancestor of Ancient Seal Characters in China" and an article "Book Fu", which unfortunately has not been passed down. Zhang Huaiguan's monographs have a profound understanding and detailed exposition of the origin and development of calligraphy, its essence, its position in social life, learning methods, calligraphy technique theory, calligraphy appreciation and calligraphy criticism. His book theory works covered all aspects of China and calligraphy theory, and constructed the basic framework of calligraphy theory in ancient China. Hope to adopt, thank you.