Answer:
They feel sad and melancholy about everything they have left in China and about the uncertainty of their own future.
Step-by-step explanation:
"The Writing on the Wall," is a poem that shows the reality of Chinese men who left their families to try to improve their lives in the USA. These men were held in immigration centers, waiting for their entry into the country to be admitted or not. While waiting for the decision of the American government, men write poems about the moment they were living and about the homesickness of their homeland and the things and people they left there. The things and people who stayed in China, were seen by them with sadness and melancholy, as can be seen in the lines:
"Thinking of affairs back home, Unconscious tears wet my lapel. "