Forty-two universities, including Tsinghua University, were selected into the list of first-class universities, including 36 A-class universities and 6 B-class universities. What's the difference between AB and AB? The Ministry of Education said that considering that the overall construction task of first-class universities is heavier and the demonstration effect is more obvious, it is more necessary to enhance initiative and enthusiasm. In order to break the solidification of identity and stimulate the vitality of construction, first-class universities are divided into two categories: A and B. It is hoped that through this way, first-class universities will be urged to speed up the reform and development of colleges and universities, and those listed as B will face up to the gap and catch up.