The most famous running script is Preface to Lanting written by Wang Xizhi, a calligrapher in the Eastern Jin Dynasty. Predecessors described it as "a dragon flying from heaven, a tiger lying in a phoenix" and praised it as "the best running script in the world".
Running script, from Wang Xizhi's hand, combines practicality and artistry. As a result, the colorful southern calligraphy art has emerged and become the most influential school in the history of calligraphy. Wang Xizhi's running script has influenced bookstores from generation to generation. Ou Yangxun, Yu Shinan, Chu Suiliang, Xue Qi, Yan Zhenqing and Liu Gongquan in the Tang Dynasty, Yang Ningshi in the Five Dynasties, Su Shi, Huang Tingjian, Mi Fei and Cai Xiang in the Song Dynasty, Zhao Mengfu in the Yuan Dynasty and Dong Qichang in the Ming Dynasty were all impressed by Wang Xizhi, so they enjoyed the reputation of "book saints".
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Therefore, the world called Cold Food Sticker, Preface to Lanting by Wang Xizhi in the Eastern Jin Dynasty, and Sacrifice to My Nephew by Yan Zhenqing in the Tang Dynasty "the three major running scripts in the world", or simply called Cold Food Sticker "the third running script in the world". Others compared the "three major running scripts in the world" and said: "Preface to Lanting Collection" is a Confucian style, "Sacrifice to Nephew" is a sage style, and "Cold Food Post" is a scholar style. Both of them are equal, each leading the way, which can be called three milestones in the history of China calligraphy.
References:
Baidu encyclopedia-running script