Management System of Graduation Design Thesis of Tongling University: The duplicate checking of graduation design has expired, so you can apply for a new validity period. If the validity period of paper duplicate check has expired, you can reapply for another validity period. Generally, paper-based duplicate checking is paid, so you should choose a duplicate checking website to pay for it, such as 50 yuan for one month, and you can check according to their tips. Some schools can also help with duplicate checking, and teachers in printing houses can also help with duplicate checking. You can ask them for help. According to the query data, the duplicate checking of graduation design in the graduation design thesis management system of Tongling University has expired, so you can apply for a new validity period.