1. Content quality problem: This is the most common reason. The author may not fully understand the research topic or do enough literature review, which leads to the low quality of the paper. In addition, if the views of the paper are unclear, the arguments are insufficient, or there are problems with the data analysis method, it may also lead to the rejection of the paper.
2. Format: Academic papers usually have strict format requirements, including citation format, margins and font size. If the author does not format the paper according to the requirements of the journal, then the paper is likely to be rejected.
3. Language problems: academic papers need to use formal and accurate language. If there are grammatical mistakes, spelling mistakes or unclear expressions in the paper, the paper may be rejected.
4. Repeated publication: If the author's paper has been published in one journal and then submitted to another journal again, it is likely to be rejected.
5. Plagiarism: Academic integrity is very important. If other people's opinions or research results are plagiarized, then the paper will definitely be rejected.
6. Research ethics: If the research method of the paper violates ethical laws and regulations, such as without the informed consent of the research object, the paper may be rejected.
7. Inconsistent with the theme of periodicals: each periodical has its own research field and theme. If the author's paper is inconsistent with the theme of the journal, then the paper is likely to be rejected.