i have a X1 visa with A 5 year multiple entries

but my first year they put canceled on my visa and i just got a residency permed. my 2 year i over stayed my X1 by a couple of months so i payed the 10000 rmb fee. now I'm back home and wondering if and how i can get back to china. my last residence permit doesn't have anything but and exit day on it. what does that mean, and what must i do to get back to school and finish up my last year.