1. The theme does not meet the requirements of journals: each journal has its own research field and theme requirements. If the topic of the paper does not meet the requirements of the journal, the submission is likely to be rejected.
2. The research method is not rigorous: the research method is the core part of the paper. If there is a problem with the research method, the scientific nature and credibility of the paper will be questioned.
3. Inaccurate or incomplete data: Data is the basis of the paper. If the data is inaccurate or incomplete, the conclusion of the paper may be wrong.
4. The structure of the paper is chaotic: the structure of the paper should be clear. If the structure is chaotic, it will be difficult for readers to understand the content of the paper.
5. Unclear language expression: the language of the paper should be concise and clear. If the language expression is not clear, it is difficult for readers to understand the content of the paper.
6. Improper citation of references: references are an important part of the paper. If the references are improperly cited, the academic nature of the paper will be questioned.
7. Plagiarism or plagiarism: Plagiarism or plagiarism is a taboo in academic circles. If plagiarism or plagiarism is found, the paper will be rejected immediately.
8. Repeated publication: If a paper has been published in a journal, it may be rejected because of repeated publication when it is submitted to the same journal or another journal again.
9. Not meeting the format requirements: each periodical has its own format requirements. If the paper format does not meet the requirements of the journal, the submission is likely to be rejected.