This is a sentence written by Ouyang Xiu, a great writer in the Song Dynasty, describing lovers meeting at midnight snack. It means meeting a beautiful woman at the top of the willow tree on the moon and after dusk, and writing the scene of lovers' love in the moonlight and willow shadow, creating a hazy, quiet, graceful and feminine artistic conception. When couples meet and date, girls send poems to boys, and they should implicitly express their thoughts about dating and be able to speak out on their own initiative. Girls like boys.