2+2 collaborative training means that after completing the first two years of study, college students can choose another university or college to continue their degree courses in the next two years, so as to obtain the degrees awarded by the two institutions. This collaborative training model makes full use of the characteristics and resources of different universities, provides students with a broader platform for learning and interpersonal communication, and is conducive to cultivating outstanding talents with diverse backgrounds and global vision.

2+2 co-culture has been widely practiced and popularized at home and abroad. For example, many universities in China and South Korea have carried out 2+2 collaborative training projects, and some of them have cooperated with internationally renowned universities, such as the cooperation project between Tsinghua University and MIT. These cooperation projects have strengthened exchanges and cooperation between universities and improved students' internationalization level and employment competitiveness.

2+2 co-culture has broad development potential and prospects in the future. This model is not limited to students' traditional subjects, but can also be extended to new fields such as humanities and social sciences to better meet the needs and development of society. Therefore, the government and universities should strengthen cooperation and give more support in system, culture and funds to promote the further development of 2+2 collaborative training mode.