The cost of duplicate checking of graduation thesis depends on which system is selected for testing. For example, the personal version of HowNet 1.5 yuan/thousand words, HowNet journals, HowNet undergraduate journals and HowNet master journals charge by article, ranging from tens to hundreds of yuan, and the price is submitted; Vip, Wanfang check 4 yuan/Qianzi; Paperfree, papertime paper check price is 1.5 yuan/thousand words.