My wife has residence permit of China on My Z Visa. She is out of China if I change job what happens

My Wife is out of China. She has a residence permit valid for next 8 months. She is in some other country right now and can come back after two months. It is depedent S1 on my 'Z' type.
If I change my job in between, what happens to her residence permit. Can she enter china and we re-apply for her S1 or it will be cancelled and I will have to apply for fresh visa for her ?