Key classes of Tieyi Middle School. Qing Qun, president of Xi 'an No.1 Middle School, introduced the "Science Elite Class" in the past five years, and said that the establishment and continuation of the "Science Elite Class" is a key class, which provides a broader and more competitive development platform for middle school students, and also opens up new ideas for the docking of universities and middle schools and exploring more educational models suitable for the development of the times.