Well-known paper duplicate checking platforms in China include HowNet paper detection, Wanfang paper detection, VIP paper detection and paperless paper duplicate checking. Whether the graduation thesis must use the paper detection system of HowNet depends on the requirements of each school. Most schools use HowNet to check duplicates, and some schools use Wanfang and paperfree to check duplicates. You can check the copy of the paper at school. It seems that there are all kinds of duplicate checking tools.