1. The General Administration of Press and Publication has opened a "news agency inquiry" window on the left side of the homepage of its website. Enter the journal name in this window, and select "Media Category" as "Journal" to query the journal information. If you can't find any information, it's usually an informal log. If you find the periodical information, you can find the information of the periodical organizer in the query results. If the organizer is a national unit, the corresponding publication shall be a national publication. If the organizer is a provincial unit, the corresponding publication is a provincial one. In addition, publications clearly marked with the words "national journals" and "core journals" can also be regarded as national journals.
2. There is a column of "Newspaper Catalogue" on the homepage of China Periodical Network, and "Media Category" is selected as "Periodical". If you can't find any information, it is usually an informal journal. If the periodical information is found, the periodical grade can be judged according to the above method.
China Journal Network generally refers to China Knowledge Network, which, like China Journal Full-text Database and Wan Fang Data, is an unofficial administrative organization. They have basically entered domestic legal periodicals, and we can find periodical information on them. In order to prevent counterfeit journals, many professional title evaluation institutions will take "whether the article is registered in China Journal Network" as an important reference data to identify the authenticity of journals.