What are the main artistic techniques used in Chunsi's two poems? What kind of thoughts and feelings did the author express?

Metaphor. Lonely geese on the cloud and duckweed on the water are metaphors of two people gathering and leaving in a hurry, leaving their sorrows and going their separate ways; Dust goes with the horse, and the moon goes with the boat. Metaphorically, we can't bear to be separated, and our hearts follow each other, indicating our yearning. Crying that Fu's war is a new ghost and worrying about the old man alone. At dusk, suddenly snowflakes are dancing in the wind. The gourd is discarded, the wine vessel has no wine, and the stove is red. The news of the front-line battle and the news of his wife and sisters are unknown. Sadness sits in the air with his hands in the air. Sadness about the destruction of the country, anxiety about the fate of the country, sadness about serving the country, loneliness and poverty in life.