This is the EAN-13 barcode, which belongs to the product barcode "692". This number is the ISBN book code, which is the code of the book. The last 10 digits belong to the International Standard Book Number and can be divided into three number segments. 7107190056 can be divided into The first number segment of the three segments is the area code, consisting of 1 to 5 digits. 7 indicates Chinese publications. The second segment number is the publishing house code, which is assigned by the ISBN center of the country or region it belongs to. The allowed value range is 2. ~5 digits. The larger a publishing house is and the more books it publishes, the shorter its number will be. The third paragraph of the third paragraph is the book serial number (Title Identifier) ??given by the publisher itself, and the book serial number of each publisher is a fixed length. The shortest one, the longest six. The larger the publishing house, the more books it publishes, and the longer the serial number. The tenth digit is the check digit of the electronic computer. Fixed one digit, automatically generated from the first twelve digits.