1. Save materials: In the process of book compilation, most of the original documents are collected directly.

Some books have been lost due to war, fire and flood.

Because the relevant materials are preserved in the classroom books, it is often possible to reproduce the contents of the books by compiling the lost articles.

Because it is easy to make mistakes in circulation and engraving, it is also helpful to collate different languages by using the original documents preserved in the textbook.

2. Searching for information: Books are arranged by category, and it is very convenient to find relevant information.

Comprehensive books collect information on various subjects, similar to an encyclopedia dictionary, from which we can find the origin of things, poetry allusions, poetry sentences, the system of names and things.

Second, important books in history:

1, magnolia Taiping, 1000.

In the second year of Song Taiping Xingguo (977), Liu Yun and others were ordered to edit it, which lasted for eight years.

2. Book House Yuan Gui, 1000 Volume.

Wang Qinruo and Yang Yi.

It started in the second year of Jingdezhen (1005), lasted for eight years, and was completed in the sixth year of Taizhong Xiangfu, namely 10 13.

It is divided into 3 1 door and 1 104 door.

The deeds of past dynasties, from ancient times to five dynasties, are arranged in order.

This collection is mainly based on historical books, with occasional references and quotations, which is of great value to the collation of historical books before the Song Dynasty.

3. A set of books called "Mountain Hall Examination", volume 2 12.

The Southern Song Dynasty chapter was written by a fool.

It is divided into 46 volumes, and hundreds of classic books are accompanied by the judgment of the book editor.

4. Yuhai, 200 volumes.

Wang Yinglin in the Southern Song Dynasty had private creations.

2 1 branch of astronomy, geography, official administration and diet.

5. Yongle Dadian, 22,937 volumes, 1 1095 volumes, with a word count of about 370 million.

In the first year of Yongle (A.D. 1403), Jie Jin compiled the document Dacheng, which was completed the following year.

Yongle was rebuilt in three years, and Yongle was named Yongle Grand Ceremony in six years.

There are more than 8,000 kinds of books in this book, and the relevant materials are rearranged according to the rhyme of Hongwu.

6. Integration of ancient and modern books.

Chen Menglei and others in Kangxi period of Qing Dynasty.

The book was written in the forty-five years of Kangxi, and it was named Integration of Ancient and Modern Books.

During the Yongzheng period, I ordered Jiang Tingxi and others to add, delete and polish.

The original book is divided into six parts and 34 records. The revised book was changed to 32 volumes, leaving 6 109 volumes, totaling 10,000 volumes.