Is the page number a periodical number?
Honey, I'm glad to answer your question. According to your question. Periodical number as a sign can distinguish different kinds of codes! —— Periodicals M—— Monographs (including historical records in ancient books) The types of reference documents are identified with single letters according to GB3469-83 "Document Types and Document Carrier Codes": M—— Monographs (including historical records in ancient books) C—— Essays N—— Newspapers J—— Periodicals D—— Dissertations. The serial number of China's official journals consists of ISSN and CN, and "CN" is the country code of China. So yes, oh, kiss, it's one meaning, and it has two expressions.