There are three types of class A, level A: SSCI, A &；; Periodicals included in HCI; Class a and class II: CSSCI journals; Class A and Class III: National authoritative professional journals belonging to two disciplines. Class B: Other journals included in CSSCI, as well as papers included in ISSHP, Xinhua Digest, China Social Science Digest, Guangming Daily and People's Daily are regarded as Class B; Class C: Journals that are not included in CSSCI but are included in China Core Journals, which have an important influence in the discipline and are mostly published by young teachers in colleges and universities; Class D: Some schools classify their low-level publications as Class D to cultivate publications, while others simply classify other general publications related to their majors as Class D, so the number of Class D is the largest and most complicated.

When quoting again, pay attention to what kind of cited literature belongs to.