The four great beauties of ancient China are commonly referred to by the titles "沉魚(yú)" (Chen Yu), "落雁" (Luo Yan), "閉月" (Bi Yue), and "羞花" (Xiu Hua). These titles are used to describe the exceptional beauty of each woman. "沉魚(yú)" refers to Xi Shi, "落雁" refers to Wang Zhaojun, "閉月" refers to Diao Chan, and "羞花" refers to Yang Yuhuan. These titles have become synonymous with their respective names and are often used to depict the beauty of women in Chinese culture.