Whose is Zhu Yan's poem?

This is a sentence in the poem "Dead Hua Lian" (1) by Wang Guowei, a master of Chinese studies:

"Read Tianya parting bitter, no return, scattered flowers. Flowers have nothing to say, and the green window is spring. I will tell you under the acacia lamp that I have new love and old hatred for Qian Qian. The most important thing is that the world can't stay, and Zhu Yan's words are beautiful. "

Literally, the sentence "The most important thing is that the world can't stay, and Zhu Yan speaks in the mirror" means that when people are old, when they look in the mirror, they can't find the "Zhu Yan" (referring to the face) when they are young; Flowers wither and fall from the branches one after another, which is the most irreversible expression of the natural laws in the world. This sentence fully expresses the author's feelings and helplessness about the years.

Wang Guowei likes to quote famous sentences from previous poems in his lyrics. Among them, "Zhu Yan Jing Hua Yuan" comes from "Treading the Magpie" written by Feng Yansi, a poet of the Southern Tang Dynasty in the Five Dynasties.