Why is "Sacrificing a Nephew" called the second running script in the world?

"Sacrifice to a Nephew" (full name: Sacrifice to a Nephew and Praise to a Doctor) is a calligraphy work written by Yan Zhenqing, a calligrapher of the Tang Dynasty, in the first year of the Tang Dynasty (758). It is now in the National Palace Museum in Taipei.

The manuscript of "Sacrificing My Nephew" is Yan Jiming's manuscript, which is a memorial to his nephew. * * * 23 lines, 234 words. This manuscript describes how Yan Gao Qing's father and son stood up and loyally opposed it during the Anshi Rebellion, so that "the father was trapped and the child died, and the nest turned upside down" brought justice into his heart. Throughout the pen, I feel like a tide, the calligraphy is magnificent, and the vertical pen is bold and unconstrained.

Wang Xizhi's Sacrifice to My Nephew, Preface to Lanting and Sushi's Huangzhou Cold Food Post in the Northern Song Dynasty are called "the three major running scripts in the world" and "the second running script in the world". Moreover, this manuscript was written in extreme grief and indignation, regardless of the clumsiness of pen and ink, so the words fluctuate with the calligrapher's mood, which is purely a natural expression of spirit and peacetime work. This is rare in the whole history of calligraphy, so "Sacrifice to a Nephew" is one of the original works with great historical and artistic value.

The manuscript of "Sacrificing a Nephew" is more emotional, mixed with grief and indignation, and informal. Preface to the Lanting Pavilion is more leisurely, with bold and unrestrained words, and more elegant and elegant. However, the original preface to Lanting Collection has been lost, so it can also be said that the draft for the sacrifice of nephew is the best running script in the world.