The moon is round: it generally expresses homesickness (homesickness, love). In addition, it also reveals a touch of sadness. Where there is a moon, there is wine, and the moon will sing. It can be said that it is sad to set off the lonely figure of the poet. It is often said that this is a good month. Since the moon is round, why can't the person I miss be reunited with me?

Sometimes, it is to express the feeling that a wanderer is homesick and can't go home.

The crescent moon generally misses women by columns, similar to the full moon, and generally uses the moon to express feelings.