Official script is relative to seal script, and its name originated from the Eastern Han Dynasty. The appearance of official script is another great change of China characters, which brings China's calligraphy art into a new realm, is a turning point in the development history of Chinese characters, and lays the foundation for regular script. Official script is flat, neat and exquisite. In the Eastern Han Dynasty, the painting methods such as skimming, pressing and pointing were beautified as upward provocation, with different degrees of severity and artistic beauty of calligraphy. Styles also tend to be diversified, which is of great artistic appreciation value.