Wanfang Duplicate Checking: This system has relevant cooperation with Xuexin.com at present, and it is a paper duplicate checking system needed by many schools. The cost of duplicate checking is about 3-5% in 4 yuan.

HowNet duplicate checking: This is the duplicate checking system required by most schools. It has an independent duplicate checking database and a joint comparison database for college students, including the papers of seniors and sisters. If the school requires using HowNet to check the duplicate, don't copy the senior's paper and be found out in minutes.

VIP weighing: VIP weighing is a well-known system at the same level as Wanfang, which is also needed by many colleges and universities, and the testing cost is relatively cheap, only 3.5-4 yuan per thousand words.

Paperless duplicate checking: This is one of the systems in the Paper series that support free experience duplicate checking. This system provides a free paper experience of 10,000 words, which is enough for general papers to be duplicated.

These paper duplicate checking softwares are reliable, but which system to use depends on the requirements of schools or institutions.