Need. The main purpose of duplicate checking is to check the originality of the paper and avoid academic misconduct, such as plagiarism. In the process of writing a paper, even the first draft needs proofreading to ensure the originality and academic value of the paper. Through duplicate checking, the author can know whether there is any duplication in the paper with the existing literature, so as to modify and adjust it in time. This helps to avoid serious repetition in the later stage of the paper, which will affect the publication and academic reputation of the paper.