Sometimes they’re educated, sometimes they’re not, but they’re all human beings with lives and stories. Nobody leaves his or her country unless there’s a reason to. You don’t do it just because the US is the best country in the world. You do it because there’s something that’s making you leave.
I'm so sorry for some of the domestic workers, some have no days off, and some workers are singing on the day they are off or making cards. Leisure and activities they need, but then they are left with nothing.
There's a really clear group boundary between those from Hong Kong and those from Mainland. That makes the study more interesting, because you cannot find such a case in other parts of the world. We see that even with people with the same race and ethnicity, they still have to cross boundaries to meet local friends to develop social ties.