What's the explanation in "Migrants Tears Dust"

The original poem is: the tears of the adherents are all in the dust. Write about the people in the occupied areas eager for recovery. The people in the occupied areas groaned in pain under the iron feet of the Jin people, and their tears have dried up. How much they want to return to the embrace of the motherland, but they look forward to Julian Waghann's Northern Expedition every year, and they are doomed to be disappointed every year. Tears fully reflect the feelings and painful life of the people in enemy-occupied areas, and the word "tears" describes the degree of this emotion. Do: drainage.