Arabic numerals. The page numbers in academic papers should be marked with Arabic numerals, starting from the introduction or table of contents, and increasing each page in turn. If there are page numbers such as cover, abstract and table of contents in the paper, the page numbers of these parts are not numbered, but marked with Roman numerals. For example, if the cover is not numbered, it should be marked "sealed edition", and the abstract is not numbered, but it should be marked "selected edition".