Copying books means that the original books are scarce now. Generally, most of the books copied are books with relatively long ages and earlier versions, which have been discontinued and out of print. Pay attention to distinguish the authenticity of the printed version.

The copied books are scanned and printed by the copier, or printed by the electronic version collected online, and then bound into a book. Some may not have a cover, and the better ones will color print the cover. A small number of copies can be made in a single copy, and the number is unlimited.

Need to pay attention to distinguish between photocopying and photocopying, photocopying is a real copy, photocopying is not necessarily. Ancient books and foreign language books generally use photocopies. In order to show the original appearance of the ancient books, the books published by the publishing house do not make any changes or annotations to the ancient books, and the books published directly are photocopies.