Extended data:
There are two ways to study in University 2+2: One is that if you study abroad, the domestic school will keep your student status. When you come back from studying abroad, continue studying for four years and get a bachelor's degree certificate. To study abroad, you can get a certificate of studying abroad.
The other is that as an exchange student, you study abroad and the school gives you basic credits. You don't need to take credits for two years of study. You can graduate directly and get bachelor's degree certificates from two schools.
References:
Baidu encyclopedia-Chinese-foreign cooperation major