Paper duplication checking refers to the repeated detection of papers to detect whether there are plagiarism, repetition, omission and other problems in the papers. This test usually compares the databases of major papers, such as CNKI, VIP, PaperFree, papertime, etc. To determine whether there is something highly similar to other documents in the paper and its proportion in the total text reproduction ratio.

The main purpose of paper duplication checking is to avoid academic misconduct and ensure the integrity and quality of academic research. In the field of academic research, paper duplicate checking has become a normal work, which is widely used in academic evaluation, award selection, degree awarding and so on. Some universities or academic institutions will also require all submitted papers to be checked to ensure the standardization and quality of academic research.

In short, before submitting the paper, everyone should consciously check the duplicate to ensure the originality and academic integrity of the paper. At the same time, the author should also pay attention to his own language expression and argumentation logic to avoid improper quotation or plagiarism.