The situations of emigrant professionals are harder to summarize. If they can find a job, mostly they won't return, because they have sold their houses in Hong Kong. Those who can't find a job will be forced to return; a batch of emigrant teachers returned under just such circumstances.
「專業移民」情況較不一定，找得到工作的，大概都不回來，因為房子賣掉了；找不到工作的一定得回來，像之前有一批教師移民就是如此。