CNKI: CNKI is one of the authoritative duplicate checking websites in China, with comprehensive database and accurate duplicate checking results. Because it is not open to individuals, it can only be tested in other ways.
Wanfang: Wanfang is a duplicate checking website that is rarely used in colleges and universities. Its price is similar to that of VIP, but it doesn't support English test.
Wei Pu: Wei Pu is an old-fashioned paper duplicate checking website, and its database is second only to HowNet. Both Chinese and English can be tested, and the final version is recommended.
Paperfree: This website supports paper detection in Chinese, English and minority languages. The database is almost close to HowNet, and the detection results are relatively accurate. In addition, the website also provides complete weight checking functions such as machine weight reduction and online weight change.
Papertime: New users of this website give away 10000 words for free, and the excess is charged 1.5/ thousand words, which is cost-effective. Its duplicate checking algorithm is strict, but there are still some differences compared with HowNet.
Paperday: This website provides papers testing in Chinese, English and minority languages. It has an extensive database and accurate repeated inspection results. At the same time, it also provides online weight change, machine weight reduction and other functions.
Generally speaking, each paper duplicate checking website has its own characteristics, and which one is most suitable depends on your needs.