Small papers in periodicals need to be proofread again to ensure their originality and academic integrity. Duplicate checking is usually carried out by using special duplicate checking software, which can detect whether there are plagiarism, plagiarism and other academic misconduct in papers. The specific criteria of duplicate checking vary with journals and paper types, but most journals require that the duplicate checking rate of small papers should not exceed a certain proportion, generally between 10%-30%. Before the re-examination, the author can learn the specifications and requirements of the re-examination papers from official website and other channels, and make targeted amendments and improvements. It should be noted that some journals may adopt strict duplicate checking standards, and even require the duplicate checking rate of small papers to be lower than 5% or lower. Therefore, the author should carefully check the duplicate before submitting the paper to ensure the quality and academic integrity of the paper.