Blind trial is anonymous submission. In the process of review, the review tutor can't know who the author of the paper is. This is a common method used by colleges and universities to review papers, so that the scores reviewed are the most impressive and the fraud rate is very low.

There are two kinds of blind evaluation: on-campus blind evaluation and off-campus blind evaluation. In-school blind evaluation refers to sending your paper to teachers in other colleges for review, while out-of-school blind evaluation refers to sending your paper to teachers in other schools for review.