work permit and residence permit cancellation and query?

I am from India ,working in China form last 10 months ,suddenly i need to quit the job and go back to India.(return tickets already booked)

My questions are
1.Do I need to cancel my work permit and residence permit before I leave PRC? (I think my company HR is not having a clear idea about this issues)
2.If the answer is YES then how can I cancel the work permit and R visa?what is the process?how long the process will take?
3.Do my wife need to cancel her residence permit ? (she is in dependent type)