2. Argumentative paper: This is a paper that aims at others' views on an academic issue of a certain discipline, with sufficient arguments, focusing on exposing its shortcomings or mistakes, and expressing opinions through argumentation.
3. Summative paper: This is a paper that introduces or comments on an academic issue of a certain subject on the basis of summarizing the existing research results of predecessors or present people to express their opinions.
4. Thematic paper: This is a kind of paper that expresses opinions in the form of direct discussion and puts forward academic problems of a certain subject from the front on the basis of analyzing the previous research results.