The full name of "Sacrificing a Nephew" is "Ji Ming Sacrificing a Nephew", which was written by Yan Zhenqing, a calligrapher in the Tang Dynasty. It is an ink book on hemp paper, 28.7 cm high and 77 cm long, with 23 lines and 235 words in total. Another 34 words were erased, making a total of 269 words. The Manuscript for Sacrificing a Nephew is a memorial to Yan Gaoqing, the elder brother who died in the Anshi Rebellion, and his nephew Ji Ming. This is a manuscript, which was not originally written as a calligraphy work, but it is precisely because of no intention to write a book that the word is written with great energy, magnificent brushwork and natural charm. Manuscript calligraphy is highly respected by later generations. Zhang Yan commented on the cloud: "It is better to write a complaint than to draft it. The cover is an official work, although the end of the letter is a rope contract; Letters are quite indulgent when they are on a whim; Moreover, the drafting was unintentional, and it was his palm that was forgotten. It's great to see it here. " In Yuan Dynasty, Xian Yushu commented that this post was "the second running script in the world". There are nine inscriptions on this manuscript, and the bells are printed with the words "Zhao Zichang's name", "Ya", "Xian Yu", "Shu", "Xian Uncle" and "Xian Yu" respectively. It was once collected by Song Xuanhe's Neifu, Yuan, Xian Yushu, Ming, Qing, Xue, Wang and Qing Neifu, and is now in the National Palace Museum in Taipei.