The grid of duplicate checking is similar to CNKI of China Knowledge Network. Gezida paper detection system can quickly and accurately detect the repetitive content in the paper, and support a variety of document formats. Its duplicate checking algorithm and comparison technology are similar to the duplicate checking software of China HowNet, so the duplicate checking result of the grid is comparable to that of China HowNet.

However, it should be noted that different duplicate checking systems may have different duplicate checking standards and algorithms. Paperfree and papertime are auxiliary revision references, which provide free weight checking, machine weight reduction, online revision and other functions, covering about 70% of HowNet's data, which can reduce the absolute cost of pre-inspection fees. After it is finalized, it is recommended to use the duplicate checking system required by the school or institution, just in case.