First, the professional field of the reviewer must be closely related to the content of the manuscript. Some authors think that the more "awesome" experts are, the better. But if the professional field of this awesome expert is too different from the content of the paper, it is helpless. In the eyes of periodical editors, it still belongs to the category of "inappropriate".
Second, the reviewers have published articles in related fields in the past at least ten years. This article is to ensure that the reviewers are still active in this field recently and have a deep understanding of the latest progress in this field. Some scientific experts may change their research interests or retire when they are old.
Third, the recommended reviewers should be experts who are still engaged in scientific research. You can come to the 58 journal network for consultation and so on.