Undergraduate graduation thesis is checked from March to June every year, which is also called graduation season. June is the last month of the graduation season, and the final duplicate check and the preliminary examination of the application are needed. However, the specific paper duplicate checking time is related to the school regulations. Some schools will have the opportunity to check the duplicate in advance, but most of the time there will be requirements, and they will also be required to check the duplicate within the set time, which will not affect the duplicate checking rate of papers. The database will be updated regularly due to the use of a temporary checkweighing system. However, some schools do not require time for duplicate checking, and only need to use a reliable duplicate checking system for testing. It should be noted that the copies need to be checked in advance before being submitted to the school for review.