The Book of Sun Guoting by Song Ke Cao Zhang in Ming Dynasty.

Song Ke (1327— 1387), also known as Ke Wen, was born in Changzhou, Jiangsu. Song Ke was born in a very rich family, and he dabbled in a lot of books since he was a child. Because of his generous nature and huge body, he had Ren Xia's behavior. His family has a large number of people, and he likes to drink a lot of money, so his family's wealth is gone. During the Yuan and Song Rebellion, he wanted to make contributions, went north to the Central Plains and raised the banner of righteousness, but was blocked by the middle road. So he returned to Jinling, You Jiang, Jinhua, Zhejiang and Huiji Mountain. In his later years (Hong), he served as Tongzhi in Fengxiang County, Shaanxi Province, and soon resigned and returned to his hometown. During his seclusion, he interacted with Yang Weizhen, Ni Zan and others and sang with poems. In particular, Yang Weizhen likes Song Ke's calligraphy very much. If he has new poems, he often asks Zhong to write them. Song Ke's pursuit of excellence can be traced back to Cao Li in Wei and Jin Dynasties. In particular, he has a deep research on the imperial statue "Urgent Chapter" handed down from generation to generation. His real book is from Zhong You, and his cursive script is Urgent Grass left by the two emperors. It is elegant and smart, and the most commendable thing is that he integrates Cao Zhang into his cursive script and is unique. Wu Kuan commented on his book: "Shu Ke came out of Wei and Jin Dynasties and got the method of Wang Zhong, so his pen is fine and Mo Miao, and his expression is charming and lovely." His handed down works include: Li Bai's Difficult Journey, Records of Seven Seasons, Poems of Du Zimei, Postscript of Dingwu Lanting, Poems of Serina Liu, Poems with Shadows, and Urgent Grass. The Book of Song contained in this volume is presented to his good friend Yu, with no signature.

Song Ke's Book of Sun was presented to his good friend Yu, but this book was not written later. However, reading this book is clear and vigorous, and the words are scattered. The book was written in one go, without any slack. It can be said that in essence, it is bold and unrestrained everywhere, subtle and skillful, and suspicious with a pen.

At the end of the Yuan Dynasty, Zhu Yuanzhang rose in droves, expelled Meng Yuan and made Nanjing his capital. Since the first year of Hongwu (1368), he has been in the Ming Dynasty. In the early Ming Dynasty, Zhao Mengfu's stable style in calligraphy was basically continued. Calligraphers represented by (,,) and Er Shen (,Shen Shenyun) during the Three Song Dynasties were all weak in creativity, except for "",although there were some famous calligraphers at that time, especially Yongle Xuande and Shen.