Are you working for the schools directly or some
sort of 'organisation' that places you and provides the curriculum?
I and a number of others have had some bad dealings with a Simon (owner) and Victor (first gofor) within the Hebei region. They have a head office near Beijing Normal university in Beijing and claim to have some affiliation with an Australian university. They can not be trusted at all! They will ask you to trust them, which of course means you shouldn't.