What aspects are described in Du Fu's ancient poem Sunset?

Life in the mountain village: herds of cattle and sheep have already returned from the fields, and every household has turned off firewood and reunited with each other.

Natural environment: The first joint wrote that the faint afterglow of the sunset filled the remote mountain village, and the joint wrote that the evening breeze was cool and the bright moon was in the sky; Neck couplets are written about the cold moonlight sprinkled over mountains and rivers, the deep springs and flowing water gurgling on the stone walls, and the dew of autumn night condensed on the grass roots, crystal clear.