In the latest version 5.3 of HowNet duplicate checking system, a "source code library" has been added. The official explanation of HowNet is "supporting the selection of this library as a comparison resource library, and supporting source code detection, such as. Cpp, java and. py”。 Therefore, it is easy to repeat the code in the graduation thesis of computer major. Moreover, it should be noted that in the latest version of the duplicate checking system, OCR intelligent recognition technology has also been greatly upgraded, such as image text grabbing, formula recognition, text box recognition, etc., and the recognition probability is very high.