1. The first batch of papers submitted for review and the second batch of papers submitted for review are the first and second links in the review. The preliminary examination is completed by the magazine, and the external examination is completed by external reviewers.

2. The preliminary examination is mainly a rough review of the article, that is, a rough browse. Editors mainly pay attention to whether there are problems in the writing of articles, whether the research direction is consistent with publication, and whether some sensitive issues are involved. All aspects can pass the preliminary examination, and the difficulty is not too great.

3. External review is a review of the core content of the article, so external review is very strict. Moreover, the external review is done by people outside the magazine, which should be said to be more objective. External reviewers are generally experts and scholars of their own profession, and carefully examine the professional content in the article.