1. Carnegie Mellon University: CMU for short is a private university located in Pittsburgh, Pennsylvania, USA. It is a member of the Global University Presidents Forum, with 14800 students and 1483 faculty and researchers, ranking 22nd among the best universities in the United States in 2023U.S.News.

2. University of Wisconsin: The University of Wisconsin is a university system composed of several state universities, namely "University of Wisconsin System". At the same time, the University of Wisconsin often refers to the University of Wisconsin-Madison, which is located in Madison, the capital of Wisconsin.

3. University of Illinois at Urbana-Champaign: The University of Illinois at Urbana-Champaign, founded in 1867, is a public research university located in the twin cities of Urbana-Champaign, Illinois, USA. The university is a founding member of the top ten American leagues and a member of association of american universities, and is called "public Ivy League".

4. University of Wisconsin-Madison: Founded in 1848, the University of Wisconsin-Madison is a world-class public research university located in Madison, the capital of Wisconsin, USA. It is the flagship institution of the University of Wisconsin system, and a founding member of association of american universities and the Top Ten Alliance.

Purdue University: Purdue University refers to Purdue University West lafayette, the flagship branch of Purdue University in the American public university system. It was founded in West lafayette, Indiana with the number 1869. It is a founding member of the Top Ten Alliance and a member school in association of american universities. Mainly in science and engineering, business, agriculture, forestry and social sciences, there are no medical schools and law schools.