In ancient times, in Qidong County, Hunan Province, which was rich in day lilies, it was essential to stew day lilies together during festivals. The day lily is cold, which means that after the host and guests have drunk it, they sometimes forget the last sober-up, so some guests will complain why they haven't served the day lily yet, and they will easily say, Hurry up, I'll wait for the day lily to get cold! The extended meaning is: waiting for a thing or a person for a long time is like waiting for the day lily on the vegetable table to get cold.

There is another saying that is slightly different. That is to say, in areas such as Hunan, the largest producer of day lily, the last dish at the banquet a long time ago was day lily. If the last dish is cold, everyone will certainly blame you, but in order not to hurt face, just say "wait until the day lily is cold." Later, I used "the day lily is cold" to indicate that the time was too long, and it was too long and too late. It is not only a criticism of latecomers, but also a mockery, which does not hurt people's face.

Originated from the idiom "tomorrow's yellow flowers", the phrase "tomorrow's yellow flowers" expresses Su Dongpo's "Don't hurry home when you meet, and tomorrow's yellow flowers will be sad". It refers to the gradual withering of chrysanthemums after the Double Ninth Festival, and is often used to refer to things that lose news value or timely function.