IF is the abbreviation of impact factor, which refers to the impact factor of periodicals. The higher the impact factor, the greater the influence of the representative journals and the higher the academic level. Therefore, if the journal of> 10 is usually of high quality, the papers published in this journal can often get more attention and citations. However, it should also be noted that the impact factor is not the only criterion to measure the quality of journals, but also needs to be combined with other evaluation criteria, such as the quality of peer review, the field of publishing papers, and the group of authors.