Many academic journals at home and abroad have strict requirements and restrictions on the number of words selected for papers. Taking domestic magazines as an example, "scientific and technological information" requires that "the titles of all articles should be within 20 words". "Environmental Science Research" requires that "Chinese titles generally do not exceed 20 words, with English titles attached. Subtitles should be avoided as much as possible, and abbreviations, characters, codes, structures and formulas that are not widely known and common should be avoided. " Science and Technology Herald requires the title of the paper to be "No more than 20 Chinese characters in Chinese and no more than 10 notional words in foreign languages".

Foreign sci-tech periodicals have strict requirements on the length of topic selection. If the topic exceeds the specified length, it may be rejected directly. For example, the British magazine Nature requires that the title of a paper "should not exceed 3 lines, each line should contain 30 characters (including spaces), and generally should not contain numbers, acronyms, abbreviations or punctuation marks (colons can be used if necessary)". The American magazine Science requires that "the title and subtitle should use descriptive phrases, not complete sentences." The maximum length of each line is 30 characters, the titles of reports and research articles shall not exceed 3 lines, and the titles of abstracts shall not exceed 100 characters. " The American Mathematical Society once demanded that the title of a mathematical paper should not exceed 12 words, and the text should be simple and clear, seeking truth from facts, and avoid using redundant and exaggerated words in advertisements.