June 9 to 20, 2022. In official website, Jiaotong University, I learned that in 2022, the duplicate checking time of Jiaotong University papers will be from June 9 to 20 every year. Paper duplication checking refers to a process of uploading papers to the duplication checking system for testing, which is referred to as paper duplication checking for short. Paper duplication checking is used to check the repetition rate, citation rate, format and typesetting of papers. Only by checking the duplicate of the school's papers can we welcome the defense link.