The external evaluation of papers refers to the second step of evaluation, also known as review, which is a very important and key step in evaluation. The passing rate of external audit can be said to be the lowest in all aspects of audit, and the rejection rate is also very high. External audit is mainly carried out by external experts of the journal, not internal personnel of the magazine, so the audit of articles is more objective. To successfully pass the external audit, it is necessary for the external audit experts to reach a consensus. If one of the experts has a problem with the article, the external review may not pass the review smoothly, so the external review is strict and takes a long time.

External audit mainly examines the professional content in the article, and the author only needs to control the direction of his article. As long as the professional content in the article is scientific and reasonable, and the data and documents are true and reliable, it can reflect the latest development and achievements in this field.