Yao Chun Guo, 42, has worked in Ethiopia for one year.
"I do miss my family and I want to see them. In the last year I have only seen my wife via the internet," he says.
The workers do occasionally go out to eat in the city, he adds, sometimes to a Chinese restaurant and sometimes to Ethiopian venues. They are made welcome, he points out.
"In Africa many countries are friendly to China and they want us to come. I think China and Africa have a good future together."