"Shu Pu" is a calligraphic masterpiece skillfully crafted by Sun Guoting over 1,300 years ago during the early Tang Dynasty (618-907). Spanning 27 centimeters in height, it was written across 20 sheets of white hemp paper, extending to a length of nearly 9 meters. The work not only exhibits a stunning script but is also considered one of the most important narratives in the study of traditional Chinese calligraphy.

Also referred to as "A Narrative on Calligraphy" or the "Treatise on Calligraphy," "Shu Pu" holds great historical importance. According to Li Gangtian, a professor at Zhengzhou University, "Shu Pu" is a work that no other calligrapher can afford to overlook, as it possesses a value not only in calligraphy but also in calligraphic theory and literature.

Firstly, professor Li Gangtian noted that "Shu Pu" is a prime example of "small cursive," which is known for its standardization, making it an essential model for beginners. What's more, it offers insight into the brushwork techniques of the renowned calligraphers Wang Xizhi and Wang Xianzhi, enhancing its artistic value.

"The masterpiece reveals a harmonious interplay of central and lateral strokes, exhibiting flexibility and creating captivating lines. Central strokes symbolize simplicity and solidity, while lateral strokes exude elegance and beauty. It combines a sense of stability, simplicity and elegance," said Li.

Secondly, beyond its calligraphic importance, professor Li Gangtian believes "Shu Pu" boasts over 3,700 characters of theoretical content that touches on topics such as artistic criticism, writing techniques, appreciation, education, and offering a deeper historical insight into calligraphy.

For example, within "Shu Pu," there lies a crucial theory about appreciating the cursive script. It says: "The value of calligraphy lies in its flowing and smooth strokes." Meanwhile, in terms of practicing calligraphy, it also says: "A master calligrapher truly excels in both wisdom and skill, with their mind and hands flowing freely without constraint." That's why many beginners writing in the cursive script refer to "Shu Pu" as the model for their practice.

Lastly, Professor Li Gangtian said that "Shu Pu" is also a captivating literary creation, composed in regulated verse, with an elegant and rhythmic prose style.

Clearly, the significance of "Shu Pu" has transcended calligraphy. Possessing calligraphic, theoretical and literary value, "Shu Pu" is perceived by many as a vast repository of treasures, deserving thorough exploration and contemplation.