Just check the copy of HowNet. If the school doesn't say that we can't test HowNet in advance, we can test it at will, but there may be hints when the school tests it, but this doesn't affect it. And if the school emphasizes that it can't use HowNet to detect in advance, then don't use it, otherwise the school will be in trouble if it sees the words detect in advance and warn in advance.

The duplicate checking of HowNet is really based on "13 words that are repeated with other articles", which is consistent with what some network authors have said before. If you can change your paper into any sentence and make sure that any consecutive 13 words are different from other articles, HowNet can't find it.