ISSN international standard serial number

CN subscription number

The serial number of official periodicals consists of the international standard serial number (ISSN) and the domestic unified serial number (CN), and "CN" is the national code of China. If there is no "domestic unified serial number" or "internal newspaper approval", it can be regarded as an illegal periodical in China, which is not recognized by the state and is not allowed to be distributed in China. The standard format of the CN serial number is: CN XX-XXXX, in which the first two digits are the area numbers of provinces, autonomous regions and municipalities directly under the Central Government, and print CN(HK) or CNXXX(HK)/R, which is not a legal domestic unified serial number.

Applying for an international standard serial number (ISSN)[2] can make publications meet international standards, and the names of publications recognized by the United Nations can be used as long as they are not repeated, and the serial number is valid for a long time.

The international standard serial number can accurately and quickly identify the name and publishing unit of a periodical (newspaper/magazine, etc.). ). This system has been used in most countries all over the world and has become a prominent symbol of standard journals. (In some countries or regions, in addition to the international standard periodical number, standard periodical publications also require national or local periodical numbers to facilitate management. )

All for the benefit of management, database establishment and resource sharing.