Academic journals mainly publish academic papers, while non-academic journals mainly publish documents, reports, speeches, experiences, knowledge, etc., which can only be used as materials for academic research, but not as articles of papers. Because the selection of "General Introduction" is based on "a large number of articles published", "a large number of articles included" and "a large number of citations", it does not emphasize the boundary between academic journals and non-academic journals, and naturally there is no strict distinction. Specifically, Chinese core journals are divided into academic and non-academic, mainly in two aspects: one is the nature of the journal, and the other is the purpose of the journal.