Class C papers are an index to evaluate the level of scientific research. Class C papers usually refer to the research results published in some low-level academic journals. These periodicals have low publishing threshold, low editing level and uneven content quality. Therefore, the research results and quality of C-type papers are often not as good as those of A-type or B-type papers.

As an index of scientific research evaluation, class C papers play an important role in evaluating the performance of scientific researchers and scientific research achievements. The quantity and quality of C-type papers may have an impact on the evaluation of scientific researchers' professional titles and research funding subsidies, but due to the instability of the quality of C-type journals, its evaluation effect needs to be carefully considered.

As a low-level publishing form, class C papers are sometimes used in interdisciplinary research. Cross-research between some fields and topics may only be published in low-level journals, but we should also pay attention to whether such papers have academic contribution and practical value.

Although the impact factor of C journals is low, they also contain some excellent research results. However, the publishing threshold of class C papers is low, and there are some inferior papers and even pseudo-scientific research, which need to be carefully considered when evaluating the quality of research results. Therefore, researchers need to carefully evaluate and select journals when publishing C-type papers.