617 years ago today, on December 14, 1408 (November 27, 1408, the 1408 lunar calendar), the Yongle Ceremony was written. The compilation of Yongle Dadian and Yongle Dadian began in the first year of Yongle in the Ming Dynasty (1403). At that time, Zhu Di, the founder of the Ming Dynasty, had just seized power from his nephew Emperor Jianwen. In order to express his teaching of literature and governance to win over people's hearts, he ordered Xie Jin and others to edit this book. It was completed in 1404 and named "Literature Dacheng". Soon after, Zhu Di, the founder of the Ming Dynasty, believed that the content of the book was not detailed enough and inconsistent with the original intention of revising the book, so he sent more assistance to the crown prince's junior teacher Yao Guangxiao and others to participate in the re-editing. More than 2100 people participated in editing, proofreading and copying this time. It took five years to complete the project on December 14, 1408, the sixth year of Yongle. The main text was 22877 volumes and 60 volumes of general examples and catalogs, totaling nearly 22900 volumes. It was packed into 11095 volumes, with a total of about 370 million words, and was named "Yongle Grand Ceremony". This book is a large-scale genre unprecedented in the history of our country. Collect and record seven to eight thousand music collections, including classics, history, poetry, collections, interpretation, Taoism, opera, Pinghua, medical divination, engineering techniques, agronomy and other works. The collection is extensive and the information is abundant. The style of the book is based on the rhyme of "Hongwu Zhengyun" compiled by officials in the early Ming Dynasty, and the compiled materials are arranged according to the rhyme order. That is to say: take single words as the target, use rhyme to connect characters, and detail the phonetic notation and meaning of each single word, and record the various fonts of the character in seal, Li, Kai, and Cao, and then classify and compile the astronomy related to the character, that is, the names given to the character, astronomy, geography, personnel, names, poets, songs, songs, and allusions, etc. As stated in the "General Catalog of Siku Quanshu":"Or divide the rhyme by word. Or extract an article and distinguish the rhyme by its name." "Or" is recorded in a whole book, rhyming according to the title. "Generally in line with what is said in ordinary cases," Rhyme is used to unify words, and words are used to connect things. "However, the" Siku Quanshu General Catalog "believes that it is divided into rhymes by words, title, and title, which is" fragmented and miscellaneous, disorganized "and" uneven without thread." However, the book collects ancient materials, and its titles and authors are all written in red letters, which is quite eye-catching; it is not easy to quote documents in paragraphs, articles and even the whole book. In particular, the lost texts and secret classics before the Yuan Dynasty are not passed down to the world because of their entire collection. They are very complete and preserve a large number of precious ancient documents and materials, and their origins are clear. When the "Siku Quanshu" was compiled during the Qianlong period of the Qing Dynasty, many lost books were compiled from it. Among them, 66 kinds of classics, 41 kinds of history, 103 kinds of sub-departments, and 175 kinds of collection, a total of 385 kinds and 4926 volumes. There are also more than 100 books included in the "inventory". Later, people continued to compile lost books and texts from the "treasure house" of the ancient book "Yongle Grand Ceremony". It shows the great value and contribution of "Yongle Grand Ceremony" in preserving ancient documents and materials. "Yongle Grand Ceremony" has only a manuscript but no printed edition. Originally, only one copy was copied. During the Jiajing period of Emperor Shizong of the Ming Dynasty, two copies were copied. The original copy was moved back to Nanjing. The original was stored in Wenyuan Pavilion, and the copy was stored in the Emperor's History. At the end of the Ming Dynasty, both the original and copy were destroyed, leaving only one original copy. During the Qianlong period, it was already incomplete. Later, the British and French allied forces and the Eight-Power Allied Forces invaded Beijing twice and robbed and burned the book twice. Only 64 volumes were left during the Guangxu period. Later, after extensive searches, donations and returns from all parties, plus copies, a total of more than 730 volumes were obtained. In 1959, they were photocopied and published by Zhonghua Publishing Company, and the prints were only more than 3% of the original book. After that, Zhonghua Book Company successively received more than 60 volumes and photocopied them for publication.