I'm sorry I can't tell you and I'm not familiar with that name but you should know CZZ and other agencies and schools all seem to have some connection despite different names or offices.

So the only thing I think you can do is be absolutely clear to ask them about CZZ, their relationship, if they hire/contract/work with CZZ. If they say a little or indicate any relationship then be aware and beware because CZZ may as well be called a slave-trading disrespecting crook group that tries to trap and use up foreign teachers.