2, outdated yellow flowers, yellow flowers: chrysanthemums. Chrysanthemum after the Double Ninth Festival. Metaphor of outdated or meaningless things.
3. It's full of wind and rain, full of wind and rain. The original description of the rain scene before the Double Ninth Festival. After the metaphor, an event was widely spread and there were many discussions around. Source: Song Pan Dalin's poem "Title Wall": "The storm in the city is near Chongyang."
4, tomorrow's yellow flower, yellow flower: chrysanthemum. Originally refers to the chrysanthemum that gradually withered after the Double Ninth Festival. The latter refers to outdated things or news. Source: The poem "The Prince's Nine Days and Two Rhymes": "You don't have to return when you meet, and Huang Die will be sad tomorrow."