Generally speaking, the title of a paper needs to be marked with the following items: 1, and periodical level identification: including the identification of core periodicals, national periodicals and provincial periodicals.

Identification of serial numbers in 2.CN: Only periodicals with regular CN serial numbers are legally published.

3. Identification of illegal periodicals: illegal periodicals have their specific external characteristics.

Specific identification steps/methods: 1. Log level. According to the current classification methods and different standards, periodicals can be divided into: Chinese core periodicals and non-core periodicals; National periodicals and provincial periodicals; Academic journals and general journals.

(1) Core journals and non-core journals: There are two authoritative versions of the definition of Chinese core journals in China. One is the Annual Citation Report of China Sci-tech Journals published by China Institute of Sci-tech Information; The other is the Outline of Chinese Core Journals jointly edited and published by Peking University Library and Peking University Library Journal Work Research Association.

(2) National periodicals and provincial periodicals: National periodicals refer to periodicals sponsored by the Central Committee of the Communist Party of China, the State Council and their subordinate departments or China Academy of Sciences, China Academy of Social Sciences, democratic parties and national people's organizations, as well as periodicals sponsored by national professional societies. Provincial periodicals refer to periodicals sponsored by provinces, autonomous regions and municipalities directly under the Central Government and their subordinate ministries, commissions, departments and bureaus, and journals (periodicals) sponsored by institutions of higher learning.

2.CN serial number. The serial number of CN consists of the letter "CN", 6 digits and classification number, where CN is the country name code of China, the first 2 digits are the regional code of the publication, and the last 4 digits are the serial number of the regional continuous publication. 3. The identification methods of illegal periodicals are as follows:

(1) Log on to the website of China General Administration of Press and Publication through the website of China General Administration of Press and Publication for online query, enter the media name in the query column of news organizations, and select the media category to search.

(3) If you find the publication suspicious by observing the information on the copyright page, you can inquire through the information on the copyright page.