Three universities will be selected for blind test. After the thesis writing is completed, it is generally necessary to pass the exam, and some schools need blind examination for their graduation thesis. Blind test is relatively difficult, and it takes about one and a half months. Generally issued by the school, mostly sent to other provinces, the name and tutor's name are hidden. You don't know where your paper came from, and the teachers there don't know where it came from and whose students it is, so blind evaluation is relatively objective. Blind evaluation is to send a dissertation without the author's name to an expert who is impossible to know. This score should be the most objective. Generally, colleges and universities have relevant regulations on blind inspection of papers on a regular basis, and most of them randomly select a certain number of papers for blind inspection (some schools require 100%).