The relationship between the two schools is geographical location relationship, attribute relationship and enrollment class relationship.

1. Location: Tsinghua High School and Tsinghua University Experimental School are in the same campus.

2. Attribute relationship: Tsinghua High School is a university directly under the Ministry of Education and a key middle school in Beijing. It belongs to public middle schools, including junior high schools and senior high schools, and belongs to the category of national nine-year compulsory education. Students don't charge. Tsinghua University Experimental School is a private junior high school affiliated to Tsinghua University, which does not belong to the category of national nine-year compulsory education. Students charge.

3. Class relationship: There are 1- 12 classes in Tsinghua High School, of which 1-8 is the junior middle school class attached to Tsinghua Experimental School and 9- 12 is the junior middle school class attached to Tsinghua High School.