Users of handwritten paper need to go to a regular printing shop, then use a scanner to convert handwritten paper into pdf or doc format, and save the converted electronic files to the user's mobile phone.

Users log on to China HowNet, choose the appropriate duplicate checking system under HowNet, upload the converted handwritten paper to the duplicate checking system, wait for half an hour to an hour or so to get the duplicate checking report, and finally users can modify the duplicate parts of the paper according to the report.