

S1 to S2 because of my wife's visa validity changed
I came to china on s1 visa as my wife doing her studies here,the thing is after i reach here applied for residence permit for more months but unfortunately my visa got renewed to s2 due to my wife's duration expiring in 2 months,
My questions are 1) can i apply for residence permit s1 after hers renewal?
and
2) i got a job in some foreign trading company they are ready to provide work Z what all documents required for that?and how many entries i can get as i am planning to visit my country if i get work Z now can i visit my country and back to china?
i am enclosing my details for further checkings.
i am krishna from india
MBA graduate having 2 years of exp.
Now i am in china.
This is second time i came here.
and i have taken physical examination certificate in china international travelers health examine board.
Looking forward to your reply and valuable suggestions
Thanks