Who wrote calligraphy theory's book score? Who wrote it?

Calligraphy theory's Essays was written by Sun. By inquiring about Wang Genquan's selected reading of calligraphy theory's monograph "Comment" (I), we can know that "calligraphy theory's Articles and Books" was written by Sun. Sun (1633-1704) was a famous calligrapher, seal engraver and painting theorist in Qing Dynasty. He once wrote an article on calligraphy theory called "Book Spectrum", which is different from Ou Yangxun's book of the same name. Sun's Book Score mainly expounds the basic principles and technical essentials of calligraphy art, which has a certain influence on the development of calligraphy in Ming and Qing Dynasties. In addition, Sun also emphasized that calligraphy, seal cutting, painting and other arts are interlinked, and put forward the view that "calligraphy is teaching, seal cutting and painting are auxiliary". His thoughts are of great value and significance to the theoretical study of calligraphy and painting in later generations.