1, real serial number, for example: cn37-1456/c; Cn37- 1456/c- domestic unified serial publication number, ID card of the publication (and ISSN XXXX-XXXX, i.e. international serial publication number, with the top seven representing the publishing country and language, etc. ).

2.CN: the country code of China;

3.37- 1456: The first two digits are the regional number, and the last four digits are the serial numbers of regional serial publications. 37 is Shandong, published by Shandong Province; 1456 is the serial number assigned to the publication.

4.C stands for the basic category of library classification in China, and C is an introduction to social science.