Look at the smoke curling up, and the tired birds return in the sunset. It's heartbreaking to get together and leave. When will you return from your long trip? What is this?

The meaning of the poem is to see the smoke rising again and the sunset saying goodbye to the birds. Meeting and parting between people are sad and haggard. I went to another distant hometown and didn't know when I could go back.

The author is in a foreign land. Seeing the smoke rising and the sun setting, the birds returned to their nests. I miss my relatives and friends in my hometown. I am eager to return to my hometown as soon as possible and reunite with my relatives.