Yu Xuanji was a famous poetess of the Tang Dynasty. She was known as the " crown poetess of the Tang Dynasty ". Her poems were fresh and refined, and her writing style was beautiful. With her unique artistic style and profound thoughts, she occupied an important position among the female poets of the Tang Dynasty. " The Fourth of the Five Poems of Separation " was one of Yu Xuanji's representative works. This poem expressed her inner feelings and emotional journey in a concise and concise language. It also expressed her thoughts and feelings about love and life. The first two lines of the poem," Remembering you is like the West River flowing day and night without rest ", expressed Yu Xuanji's longing for his ex-boyfriend, as well as the pain and helplessness in his heart after he left. The next two sentences," I would like to send a colored paper and a simple ruler, where do I know the vast mountains and rivers?", expressed her uncertainty and confusion about the future. The whole poem was smooth, bright, and sincere. Through the description of the natural landscape and the expression of love, it showed Yu Xuanji's unique artistic style and profound thoughts. Her poems were known as the top poetess of the Tang Dynasty. They were not only widely circulated at that time, but they were still widely read and appreciated as a part of the treasure house of Chinese culture.