As the most authoritative and professional academic website, HowNet contains the largest database in China. Universities all over the world cooperate with HowNet to protect graduation thesis. One of the principles of duplicate checking of HowNet papers is the most advanced fuzzy algorithm. If 13 words in the detected text abstract are repeated in the database, HowNet will mark them as suspected plagiarism. In addition, HowNet has set a certain percentage for the threshold of the paragraph, with a specific value of 5.