Transit Visa - Currently on student X

I am currently studying in China for a year. My student X will expire January 30th. I want to go travel to East Asia before going back to my country. My plan is to start my trip in January (still have the visa) but go back after it expired... take my things and flight back home departing from Shanghai. If I already have my ticket to go back to Argentina, am I eligible for the free transit ? will I have any problem?
Thank you in advance!