Urgent chapter, formerly known as urgent chapter, is an enlightening reading for students in Han Dynasty. Biography has thirty-two chapters, each chapter has sixty-three words. The author You Shi was an official in the Western Han Dynasty and Yuan Dynasty (48-33 BC). According to Wang Songying-lin's explanation, the title of "Set of Nine Articles" means: "Urgent meaning means that words are difficult to know, and urgent can be sought." This book was very popular in Wei and Jin Dynasties, when calligraphers often wrote many books. In the past dynasties, Cao Zhang wrote Urgent Chapter, which is the oldest book spread to the Three Kingdoms. Song Ke learned Zhang Caoshu from this book. Due to copying, the contents of "Ji Jiu Pian" before Tang Dynasty were often corrupted. At that time, the "urgent chapter" style was a new cursive script derived from official script. People call this cursive script "Cao Zhang", and Cao Zhang later evolved into a cursive script-"Today", which is two stages in the history of cursive script development.
Song Ke has written more than one book, including Forbidden City and Tianjin Art Museum. As far as the collection of the Palace Museum is concerned, this work is vigorous and simple. From his self-knowledge, combined with the detailed features of the whole article, we can know that this is Song Ke's masterpiece, which has both the god of ancient law and the shape of ancient law. In this regard, Wang Shizhen's comment is quite central: "Guan Shu's Urgent Chapter is pure and beautiful, thinking that after the punishment, it will be seen. Later, I occasionally looked at the stone tablet of the emperor. The size and front and back of the model are the same, but the waves are small and different. "
This volume consists of ten pages and more than 1,900 words, and it is meticulous, and the calligraphy skill has reached the extreme. In addition to the calligraphy value, this volume is of great value to the mutual interpretation of Cao Zhang and Zheng Shu in Urgent Chapter and the collation of lost articles.