The following are possible reasons:

Network periodicals: With the development of science and technology, many periodicals provide online editions, which usually do not need the page numbers of traditional printed editions. Online journals are usually cited and located by the unique identifier of articles, such as DOI or other means, without relying on specific page numbers.

Continuous page number: Some periodicals adopt the form of continuous page number, that is, all articles in a year or an issue use the same page number range. This practice simplifies the typesetting and printing process, and is convenient for periodical editors and readers to find and quote articles.

Special publishing form: some special periodicals, such as academic newsletter, review, book review, etc. , standard page numbers may not be needed or commonly used. Such articles are usually short and flexible, and what is more important for these articles is the information of the author and subject, not the specific page number.

Booklets or special printing forms: Some periodicals may be published in booklets, handbooks or special printing forms, and such publications may not have traditional page numbers. Instead, use chapter numbers, titles or other ways to organize and quote articles.

Proceedings of academic conferences: Some journals will publish proceedings of academic conferences. Because the organization of conference papers is often different from traditional journals, there may be no traditional page numbers. The collection of essays usually relies on the title, author and conference information of the paper for citation.

About periodical page number

1, sequential page number: most journals use sequential numbers as page numbers, which is convenient for readers to locate and quote articles accurately. Each issue starts counting again from the first page to ensure that each article has an independent page number.

2. Special marks: Sometimes articles in journals may have special marks, such as A 1, S 1, etc. These marks usually represent special types of articles, such as important comments, comments or supplementary materials. These signs are used together with the traditional continuous page number * * * to ensure that the article has independent signs.

3. Preface or table of contents page: The first page of some periodicals may be a preface or table of contents page, and the page number may not be directly related to the content of the article. The page number of the preface page or directory page is usually represented by Roman numerals, and the text is represented by Arabic numerals.