hi, i would like to attend a university here at the end of my working visa, can it be?

i have a working visa right now until the end of december this year, now, im thinking to study at one of the university here in china, my questions are, do i have to go back home to apply, or can i apply student visa before my working visa expired? and do i need to get student visa before i enroll in a school or vice versa?
thanks:-)