Periodical papers in the first district: Periodical papers in the first district are usually periodicals with high impact factors in this field, representing the top level in this field. These journals have strict requirements for peer review and papers. If the paper does not have high innovation and academic value, it is suggested not to choose the first area as the delivery object.

Periodical papers in the second district: the quality of periodical papers in the second district is also very high, but compared with the first district, it is not so strict. If the paper is innovative and meets the requirements of periodical papers in the second district, it is a good choice to invest in the second district.

The significance of SCI periodical division;

The four-level system of SCI journals is divided according to factors such as influencing factors, citation times and paper quality. It is divided into: 1 zone, zone 2, zone 3 and zone 4. The periodicals in the first district are the periodicals with the highest influence and the best quality, while the periodicals in the fourth district are relatively average.

As we all know, the impact factors of periodicals are important indicators to reflect the quality of periodicals, but they are biased, especially in different fields. For example, journals with a score of 10 in the medical field and journals with a score of 3 in the geological field are actually difficult to judge who has a higher level.

Therefore, this four-level system can intuitively reflect the academic value and reputation of periodicals. For researchers, being able to publish papers in high-level journals is undoubtedly the best proof of their research ability and academic level.

At the same time, this classification system also solves the problem that the impact factors cannot reflect the status of journals in the field.