A new word, a glass of wine, what happened to the feelings of the old pavilions last year?

Start with the sentence "a new word and a glass of wine, the weather was old last year". Write about the present situation of drinking and listening to songs. From the complex sentence patterns and light and smooth intonation, we can realize that the poet started with a relaxed and happy mood and a natural and unrestrained attitude when facing the present situation. It seems that the protagonist is addicted to feasting and chanting. Indeed, as the "Prime Minister of Taiping" who enjoys honor and worships Shang Ya, singing and drinking is one of the entertainment ways that the author is used to and willing to care about. However, while listening and drinking at the same time, this situation unexpectedly triggered a recall of a similar realm of "last year": the same late spring weather as "this year", facing the same pavilions, the same songs and wine as before. However, it seems that under the surface of everything, we clearly feel some irreversible change, that is, the long-lost years and a series of personnel related to them. This sentence contains a sense of nostalgia with the same scenery and completely different personnel. In this sense of nostalgia, there is a deep, graceful and painful feeling. In this way, even if the author is full of enthusiasm, how can he not be slightly sad? So the poet could not help but pour out such a sigh from the bottom of his heart: "When does the sun set?" Sunset is a beautiful prospect. However, what the poet caused was nostalgia for the beautiful scenery, disappointment for the passage of time, and faint hope for the reappearance of beautiful things. This is a feeling of the moment, but this feeling is actually not limited to the current situation, but extends to the whole life, including not only emotional activities, but also some philosophical meditation. The sunset cannot be stopped, and we can only hope that it will reappear in the East, but the passage of time and the change of personnel will never happen again. A close look at the word "when will you come back" seems to reflect a subtle mentality of expecting, but returning home after knowing difficulties.