The duplicate checking rate of core journals is generally required to be less than 15%, and some require to be less than 5%- 10%. The specific standards vary from periodical to periodical.

Generally speaking, in order to ensure the originality and academic integrity of the paper, the author is advised to control the duplicate checking rate at a low level, such as within 8%. This can make papers more easily accepted and published by core journals. At the same time, the author also needs to pay attention to the academic and professional nature of the paper to ensure the quality and value of the paper.