It means "blind test at school". Remove the author's name from your article and send it to your school tutor for review. The tutor doesn't know who you are, so the evaluation is more objective.

Blind evaluation refers to a paper evaluation system, which can effectively ensure the objectivity and fairness of evaluation, that is, everyone's papers are submitted anonymously, and the tutor does not know the name of the paper when evaluating. Generally speaking, colleges and universities should blindly check papers before defending them, and randomly select several papers for review. Blind trial is mainly divided into school blindness and university blindness. School blind submitted in the name of the school, college blind submitted in the name of professional. The main participants in the blind review of papers are peer experts outside the school, and graduate department is responsible for extracting them from the expert database. This is the general situation of the blind examination system of papers.

Generally speaking, if you score 60 points in the blind test, you are eligible to participate in the defense. After the defense, it will be recognized by more than 50% of the instructors. Teachers who are blind can take part in the defense, but experts who are external auditors can't.