In ancient times, the traffic was inconvenient, the travel time was long, and it was not as convenient to go home as it is today.
So I can only face the things around me and miss my hometown and relatives far away. The image of "the moon" entrusts the poet's subjective feelings of sadness and joy. Because in ancient times, scholars needed to study for fame and travel far from home, which was probably the route followed by ancient literati. Homesickness has become an emotion that often appears in tourists' minds.
2. "Homesickness, the moon in the sky knows" Since ancient times, the sky is the same moon, no matter how far it is, it is bathed with the same moon.
So when I look up at the moon, you may miss me. So there are "the bright moon on the sea, the ends of the earth at this time" and "sunny snow in the south, mountains in the north, a full moon." Whether in the past or now, it is the same reason that people send lovesickness to the moon.
3. "Tonight is white, and the hometown is bright." In the autumn of Gan Yuan, Du Fu was in Qinzhou. Because of the war, he can't communicate with his relatives. So from what he saw and heard, combined with his subjective feelings, he wrote his homesickness on the moon, which is different from the general custom.
"The moon has a melancholy image." In ancient poetry, the moon is still emotional. In nature, the moon is bright and gloomy. The moon is round, and it is incomplete, complete and defective. Therefore, in the poet's works, the moon is often associated with sadness and happiness. So when we write homesickness, we often regard the moon as an image.