"China Library Classification Number" refers to the classification code obtained by analyzing the subject of scientific and technological documents with "China Library Classification" and organizing the documents in different categories according to the subject attributes and characteristics of the documents. China Library Classification is divided into 5 basic categories and 22 major categories. Chinese phonetic alphabet and Arabic numerals are mixed, one letter represents a big category, and the alphabetical order reflects the order of big categories, and the number after the letter is used as a mark. In order to adapt to the development of industrial technology and the classification of this kind of literature, the two-letter classification of industrial technology is adopted.

According to the field of your published article, you can check it on this website:

[url= /] China map classification number [/url]

Document identification code refers to what the content of the article belongs to, which is divided into the following five categories. Our manuscripts are generally marked as the first two categories, and we require each manuscript to be marked with a document identification code. For example, Chinese manuscripts are marked with "document identification code: A"; The English manuscript is marked with "document code: A". Articles that do not belong to the following categories shall not be affixed with ID codes.

A: 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 (newsletters, reports, meetings, interviews, etc.). );

E: Documentation (including historical data, statistical data, institutions, people, books and periodicals, knowledge introduction, etc.). );