@Alex: not sure, but the idea that houses need 11 hours a day of housekeeping seems a bit much, and it can be (no, maybe it doesn't have to be) a bad idea to have one's kids brought up by one's employees so that one can go work somewhere else for more money. I don't know how many ayis may themselves be part of a 2-career team and therefore need a housekeeper themselves, although In China it is unlikely that they will have 3 kids, which is probably a good thing.