To learn western literary theory, we can refer to Seldon's Introduction to Literary Theory and Eagleton's Literary Theory. Both of them are famous contemporary writers, especially Eagleton. With the thesis co-tutor, Mr. Wang Yichuan gained a higher position in academic circles. If you have enough English ability, you can buy the original English reading. Another good textbook is Zhu Guangqian's History of Western Aesthetics.

However, these are all textbooks, and the most important or correct way is to read the original classics. No textbook can replace the reading of the original classics, so Seldon's Theory of Literary Criticism: From Plato to the Present cannot but be read.

I'm also a sophomore, and I'm going to be a junior soon. Last semester's introductory course on literary principles focused on intensive reading of original masterpieces. You can refer to:

2/ 13, Introduction: Literature and Modernity, Text Analysis: Shi Zhecun's Night of Plum Rain.

Chapter one: the form of self-discipline: theory and practice.

2/20. Formalist poetics: William Empson's Seven Hazes (Excerpts), William Wilmsart, beardsley's Intentional Fallacy, Collins Brooks' Keats' Pastoral Historian: A History Without Footnotes, and text analysis: Keats' Ode to an Ancient Greek Urn.

2/27, Structure and Significance: Saussure's A Course in General Linguistics (Excerpt), Levi-Strauss's research on mythological structure, Barthes's Freestyle Wrestling Situation and Stripping.

3/5, "Deconstruction": Derrida's structure, symbols and games in humanistic discourse.

3/ 12, Modernism: Interpretation of Eliot's The Waste Land

The second part: the form of ideology

3/ 19, daily ideology: Althusser's ideology and ideological state machine, text analysis: Wang Xiaoshuai 17-year-old bicycle.

3/26, Biopolitics: Foucault's Sexual History (Excerpt), Text Analysis: Wang Xiaobo's Golden Age.

4/2, "What is the East?" Said's Orientalism (excerpt), text analysis: Conrad's black heart.

4/9, The Voice of the Bottom: spivak, Can People at the Bottom Speak? 》; Text analysis: Selected Poems of Yang Daguo (lectured by Dr. Xu Yue)

4/ 16, Female Other: Virginia Woolf's My Room.

4/23, Female Writing: Interpreting Duras' Lover (with lectures by Li, Gong, Xia Jian and Ouyang Yuejiao)

4/30, Radical Literary Thought: Balter's Zero-degree Writing (Lecture by Sun)

5/7, Language/Desire: Zizek's Personality: Hitchcock's World

The third part: Some problems of literature research in the 20th century.

5/ 14, Institutionalization of English Literature Studies: The Rise of English Literature by Eagleton and Cultural Capital: The Construction of Literary Classics by John Jellory (excerpt)

5/2 1, the concept of "literary history": literary theory, literary criticism and literary history of Yao Si and Reynet Wellek as challenges to literary science.

5/28, Influence and Problems of Modern and Contemporary Literature Research in China, East Asia, USA.

6/4, Conclusion: "Grasping the World in a Literary Way": Takeuchi Takeuchi "What is Modern Times? Text Analysis: Lu Xun's Diary of a Madman

I hope my answer is helpful to you!