All three are paper series duplicate checking websites, covering most journals, dissertations and Internet data. The detection effect is free and the experience is good.

Pass is the first website to start duplicate checking, which gives users a deep impression. But it can only detect Chinese, not English or small languages. The duplicate checking fee is per thousand words 1.8 yuan.

Yy mainly attracts students' attention for free, and each person can test a paper for free one day. I remember that there used to be two papers that could be taken for free, but now it is estimated that it has changed. There are also three versions: professional version? (3 yuan/Wanzi) Extreme Edition? (1.5 yuan/thousand words)? English version? (1 yuan/thousand words).

Free is also a well-known paper duplicate checking website, which can receive free text for duplicate checking, and perfectly realizes the whole process of "free paper detection-online real-time duplicate checking-comprehensive paper re-detection-successful paper detection" for users. Free is 1.5 yuan per thousand words, which can detect small languages such as English. At the same time, it also has the function of online real-time weighing, which can be modified and detected at the same time. According to the actual modified sentences, there is no charge for the content that is not changed.

In short, if we use HowNet to finalize the draft, we can use these systems as duplicate checking systems for the first draft, and then use HowNet to test the final draft. If the school does not require any test systems, these test systems can be used!