At present, if the school finalizes the duplicate checking system, there will be 1-2 free duplicate checking opportunities under normal circumstances. HowNet's other duplicate-checking entrances are all charging models with different prices. It is suggested that papertime papers should be used for duplicate checking in the early stage, and the first paper is free, which can save the cost of duplicate checking in the first draft. When finalizing the paper, use HowNet.

It is almost impossible to test HowNet for free outside the website or university. Although each exam will cost a certain amount of money, if we can pay attention to the methods and control the details in the process of revising the paper, in fact, one or two exams are completely enough.