The history of Chinese calligraphy is as long as the Chinese script has been in use. Since the invention of the script on the oracle bones, Chinese calligraphy has gone through stages of development, from the seal script to the official script, cursive script, regular script, and running script. The ten most profound calligraphers in Chinese history are Wang Xizhi, Yan Zhenqing, Ouyang Xun, Zhang Xu, Mi Fu, Liu Gongquan, Su Shi, Zhao Mengfu, Zhong Yao, and Wen Zhengming. Calligraphy is a systematic form of aesthetic that encompasses all kinds of fonts, both ancient and modern that are visually pleasing. Chinese traditional characters are the doppelgängers of the simplified characters. Chinese characters change from oracle bone script and gold script to seal script, and then to official script and regular script. The general trend in history has been a transition from the traditional form to the simplfied form. The clerical script is the simplification of the seal script, the cursive script and the running script are the simplification of the clerical script, and the simplified script is the simplification of the regular script.