24, obviously I don't know your situation, but I really hope your post regarding the feasibility of international child abduction was just a momentary lapse rather than something that you're seriously considering.
Whatever problems you're having, you have no right to take that course of action - and accordingly, such a course of action would be treated as a serious criminal matter.
Are your children in danger from your husband? If so, there are legal avenues of escape from the situation.
Hope you can work things out amicably - and I hope you're just venting, but if not, this HK DOJ link discussing international child abduction should make interesting reading:
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Sorry if I come across a little harsh, but as a dad, I can't imagine the heartache that would be caused by what you're contemplating.