First of all, from the purpose, the purpose of pre-trial is to help the author find and modify plagiarism in the paper before submitting it, so as to avoid being identified as academic misconduct. The purpose of duplicate checking of formal papers is to ensure the academic quality and independence of papers, and to select excellent papers for review and publication.

Secondly, in operation, the early duplicate checking is usually carried out by the author himself, and the online duplicate checking system or software can be used for preliminary detection. This method is relatively simple and quick. However, the duplicate checking of formal papers is carried out by the editorial department of the school or periodical. Professional duplicate checking system is generally adopted. Through the comprehensive detection and comparison of papers, possible duplication, plagiarism and plagiarism can be identified.

In addition, from the results, the pre-repeated results usually only give the similarity of the paper and the arrangement of similar parts, but can not give the specific repeated content and citation source. However, the duplicate checking results of formal papers will show the repeated contents in the papers in detail and give the citation sources, which will help the authors to modify and cite the specifications.

As can be seen from the above comparison, there are certain differences in purpose, operation and results between pre-inspection and formal paper inspection. Preview plays an important role in screening, helping the author find and modify the problems in the paper. The duplicate checking of formal papers is a comprehensive and systematic testing process to ensure the originality and academic value of the papers.