You can check the contents of the copy paper again. The Internet resource database of the paper duplicate checking system and the full-text database of important newspapers will include all major books. If the relevant contents in the book are plagiarized, the duplicate checking system of HowNet will compare the contents of the paper with the contents of the book included in the database, and calculate the repetition rate of the plagiarized part according to the standard of continuous similarity of 13 characters. If the paper is repeated, the repetition rate of the paper will increase a lot.

Therefore, plagiarism should be avoided when writing a paper, and when it is really necessary to quote, the source should be indicated and the citation should be standardized.