The Sui and Tang Dynasties were the most prosperous periods in the history of Chinese calligraphy. Calligraphy of the Sui Dynasty The Sui Dynasty was a relatively short period of time. Although calligraphy reached the integration of the north and the south, it failed to achieve sufficient development. It only played a leading role in the calligraphy of the Tang Dynasty. The Sui calligrapher monk Zhiyong spent 30 years writing 800 copies of "Zhencao Qianziwen" and distributed them to various temples in eastern Zhejiang. His calligraphy has been modified according to Wang Xi's method. It is straight and beautiful, with all kinds of wonderful styles. There is a stone engraving of the "Shinso Thousand-Character Monument" handed down from generation to generation, and the ink ink of the "Shinso Thousand-Character Monument" spread to Japan is also said to have been written by Tomonaga. Another calligrapher is Ding Daohu, whose calligraphy works include "Qifa Temple Stele". The original stele has been lost, and only one rubbing has been circulated.