Exchange students go out to exchange for a year or a semester and get a diploma from Shanghai Jiaotong University. 2+2 is two years in China, and then two years abroad, with two diplomas from Shanghai Jiaotong University and foreign universities (mainly the University of Michigan at present). Moreover, the two-year tuition fee for the domestic 2+2 program is much more expensive, which seems to be 30,000 years, mainly for students from Jiaotong University-Michigan United College.