Information about the categories and topics of your articles in China Library Classification (4th Edition). Read this book when you need it.

Document identification code: In order to facilitate the statistics and periodical evaluation of documents, determine the retrieval scope of documents and improve the applicability of retrieval results, it is required that every article or material should be marked with a document identification code. There are five kinds:?

Academic papers on theoretical and applied research (including summary reports)?

B- Practical technical achievement report (science and technology), theoretical study and social practice summary (social science)?

C- Articles on business guidance and technical management (including leaders' speeches and special comments, etc. )?

D—— General dynamic information (communication, reports, meetings, interviews, etc.). )?

Electronic literature (including historical materials, statistical data, institutions, people, books and periodicals, knowledge introduction, etc.). )?

Articles, abstracts, news, blanks, advertisements, notices, etc. that do not belong to the above categories. No document ID is marked.

Article number: You don't have to worry about this, it's the number made up by the magazine after receiving the paper.