You don't have to compare Chinese and foreign literature, but it depends on your research purpose and topic selection. Comparative literature research is a subject that compares and analyzes different literary works, literary schools and literary periods. When writing a literary paper, you can choose different research directions and contents.

If your research topic is about the comparison between Chinese and foreign literature, it is very reasonable to write about the comparison between Chinese and foreign literature. You can choose two or more literary works, compare their themes, styles and artistic techniques, and find similarities and differences. Through comparison, we can deeply analyze the influence of their respective literary traditions and cultural backgrounds on the works, as well as the acceptance and interpretation of the works under different cultural backgrounds.

However, if your research topic does not involve the comparison of Chinese and foreign literature, you can choose other directions according to your research interests and purposes. For example, you can choose to study deeply in the field of domestic literature to explore the characteristics of a certain period or a writer's works; Or you can choose to engage in in in-depth research in the field of foreign literature and explore the important influence of a writer or work on the development of literature.

In short, it is not necessary to write a comparison between Chinese and foreign literature when writing a literary paper, but the topic should be determined according to your own interests and research direction.