The duplicate checking system mainly relies on China periodical databases, including China papers database, Chinese academic journals database and China academic papers database. In addition, Gezida also integrates billions of detection and comparison resources, including China academic journals, dissertations, undergraduate dissertations and other domestic and international massive database resources, as well as Internet resources.

For students, if they want to check the first draft for free, they can also use the products of paper series, such as official website duplicate checking system such as paperfree and papertime. PaperFree perfectly realizes the whole process of "no paper detection-online real-time marking-comprehensive paper detection again-successful paper detection" for users.