The school code in Tsinghua University is 10003. According to the university information released by the Ministry of Education, the original identification code of Tsinghua University was 411010003. The last five digits of 10003 are taken as the school code by default.

School codes are often used in college entrance examination and postgraduate entrance examination to distinguish different schools and different enrollment types. The college entrance examination is registered and accepted by all provinces, and the school code is compiled by the provincial and municipal education examination institutes. Tsinghua University's national enrollment code is not necessarily 10003, which is subject to the information published by the provincial and municipal education examination institutes where the candidates are located.