Key universities are those that the state considers necessary for key construction, and there is a clear list, which varies from time to time. For example, 1959, 20 national key universities, and then gradually increased, about 100. It is divided into key universities directly under the Ministry of Education, key universities directly under the Ministry and provincial key universities, all of which are accepted by one line.

In 1990s, it was renamed as 985 and 2 1 1 universities, with 39 universities in 985 and 21/2 universities1,all of which are key universities. 20 17 was renamed again and changed to a double-class university. There are 137 universities, of which 42 are world-class universities (36 are Class A and 6 are Class B), most of which are the original 985 universities, and several universities in the central and western regions have been added.

Therefore, 985,211,a double-class school belongs to the category of key universities. Although some schools do not have these titles, they are also very strong and have high admission lines. This kind of school is generally professional, one of the best in this major, and can also belong to the category of key universities.