Where the ISBN barcode of a book cannot be found on the website of the State Administration of Press, Publication, Radio, Film and Television or China Press and Publication Information Network (www.cppinfo.com), the ISBN of the book is a false ISBN. This book is pirated or fake. Because books published regularly at ordinary times must have ISBN barcodes.

You can log on to the website of the State Administration of Press, Publication, Radio, Film and Television or China Press and Publication Information Network, select the publication query function, and enter the ISBN number or CIP number to search whether it is a genuine publication.

Extended data:

International Standard Book Number (ISBN)

Number), referred to as ISBN, is an international number specially designed for identifying books and other documents. ISO promulgated the ISBN international standard in 1972, and set up the international ISBN center in the Prussian Library in West Berlin, which is the management institution for implementing the standard.

At present, publications using ISBN coding system include: books, pamphlets, microforms, Braille printed matter, etc. Before June 65438+1 October1in 2007, ISBN consisted of 10 digits, which were divided into four parts: group number (code of country, region and language), publisher number, book number and inspection code.

The new ISBN has been implemented since June 65438+1 October1. The new ISBN consists of 13 digits and is divided into five sections, that is, the 3-digit EAN (European Commodity Number) book product code "978" is added before the original 10 digit. ISBN can be used as the retrieval field of online bibliography, thus adding a retrieval way for users.

Reference link: Baidu Encyclopedia-International Standard Book Number