“国内统一刊号”是“国内统一连续出版物号”的简称,即“CN号”,目前对我国大陆出版发行的报刊,仅以“CN号”来判定其是否为经批准公开发行的报刊。“CN号”由字母“CN”和6位数字及分类号组成,CN为中国的国名代码,前2位数字为地区代码,后4位数字为地区连续出版物的序号,地区? The “domestic unified serial number” is the abbreviation of “domestic unified serial number” or “CN number”. At present, newspapers and periodicals published and distributed in mainland China are only judged by “CN number” to determine whether they are newspapers and periodicals that have been approved for public release . “CN” is composed of the letters “CN” and 6 digits and the classification number, CN is the country name code of China, the first two digits are the area code, and the last 4 digits are the serial numbers of regional continuous publications.