School and work in China.

Hey I have a question about work visa (z type) and attending university in PRC. I want to attend University, but I recently got a great job offer as well. I know if a foreigner is in PRC on an X type it is illegal for them to work, but if you have a Z type is it possible to attend university (for a degree) at the same time? If i have to choose one or the other that is fine, but it would be awesome if I could get this job as well. Thank you for your time.