The results of self-service duplicate checking service in Tongji University Master's degree library are accurate. The self-service duplicate checking service of Tongji University Master's degree library usually uses internationally renowned academic duplicate checking software such as Turnitin or iThenticate. These softwares have high accuracy and reliability, can detect plagiarism and repetition in papers, and can compare academic literature and network resources around the world to ensure the credibility and accuracy of the detection results.