Metaphor is the ups and downs of love between men and women. One side is affectionate, and the other side is unintentional. On the issue of love and marriage between men and women, wishful thinking, ruthlessness and unrequited love are similar.
It first appeared in Feng Menglong's Ming Dynasty "Yu Juan 13 Zhang Daoling 7 Textual Research on Zhao Sheng", and later appeared in Feng Menglong's Ming Dynasty "Shi Jing Juan 21 Zhao Taizu sent Jingniang thousands of miles away". Later, it was seen in Volume 15 of "Two Moments of Surprise" written by Ling Mengchu in the Ming Dynasty: an assistant minister and a maid in Korea were married, caring about the body and living in the lang department. These three books are collections of popular stories in the Ming Dynasty, so this sentence should only be a poem by an unknown scholar who was popular in the society at that time.