This essay aims to problematize, deepen, and contextualize the discussion on prose of the crucial Taiwan writer and critic Yu Kwuan-chung to reconsider the unconcealed meaning of his coming up with "modern prose." What is important is how "modern prose" is produced with consciousness of the traditional evaluation of literariness and the "poeticized poetics" due to Yu's status of being a leading role of "modern prose." In addition, how it is produced from the views of the aesthetic consciousness, the position of leading, and the literary tradition (the historical meaning of the genres) is also the question to ask. By dealing with the case study of "modern prose," the shift of modern (ist) prose could be reexamined in a broader perspective to engage its interaction with historical vicissitudes.