What is the unique function of opening the title of ancient poetry with a question?

Su Shi quoted Li Bai's "When will the bright moon come to the sky? I'll stop for a drink and ask "(Drinking asking for the moon) leads readers into the philosophical world of time and space with questions. The poet's question seems to trace the origin of the bright moon and the beginning of the universe, and it seems to admire the beauty and ingenuity of the Mid-Autumn Festival. It contains the poet's praise and yearning for the bright moon. (you can find it. . . . )