This was compiled by Jie Jin in Nanjing in the Ming Dynasty. At the peak, nearly 10,000 students with diplomas from home and abroad carefully created the largest encyclopedia of about 370 million words in ancient China in Chengxian Street of Southeast University, with 22,877 volumes of encyclopedias and 60 volumes of examples and catalogues, which were then loaded into 1 1095. ?

Yongle Dadian contains 8000 kinds of ancient books from pre-Qin to Ming Dynasty. It is an extremely precious historical document in China's ancient books and the largest and earliest encyclopedia in the world. Because of his voluminous books, he only copied one at first. 1562 (forty-one year of Jiajing), the Ming Emperor ordered 109 people to copy this book again, and it was not completed until 1567 (the first year of Qin Long), which lasted for five years. In compiling this book, the government mobilized more than 3000 people to participate in editing, proofreading, recording and marking. From the first year of Yongle (1403) to the sixth year of Yongle (1408). So it was written in Yongle period, so it was named Yongle Grand Ceremony.

The contents of Yongle Dadian include astronomy, geography, literature, art, classics, historical records, technology, agriculture, religion, medicine and other disciplines. ?

The fate of Yongle Dadian is very tragic: the original was destroyed by the war in the late Ming Dynasty, while some copies were robbed by imperialists such as Britain, America, Japan, Russia and Germany when Eight-Nation Alliance invaded Beijing, and some were destroyed by the war. After the founding of New China, 2 15 volumes were collected from China, which are now kept in the National Library. From 65438 to 0959, Zhonghua Book Company photocopied and published 720 existing books at home and abroad, only about 3% of the original books. In recent years, Zhonghua Book Company has collected all the parts that were not collected before and compiled a sequel for photocopying and publishing.