Hi I'm accepted to study in a chinese university

and they gave me my application form to X2 type (less than 180 days).
The problem is that i need to go back to my country during the semester for a week end but X2 type is not allowed to get a multi entry.
I didn't get my visa from the ambassy yet, do you think that it's possible to change my visa to an Q2 one for the multi entry? or the university would'nt granted my enrolment with a Q2?
Or do you know an other solution?