Borrowing more than 30% is plagiarism. If 30% of your paper overlaps with others, it is plagiarism, so the materials you are looking for should be integrated and changed to your own. When writing a paper, I will definitely look up a lot of information and learn from others. The key is to turn someone else's into your own, and copying is definitely not acceptable. This is the standard of paper testing now. If 70% of what you write is your own, it is no problem to quote other people's articles.

Criteria for judging plagiarism in papers;

The structure, basic arguments and contents of 1. are basically consistent with other people's completed papers (including published and unpublished papers), and the word consistency rate is over 60%.

2. The arguments and contents of important paragraphs in other people's papers are basically the same (including quotations), and the word consistency rate is over 70%.

3. It is basically the same as the continuous sentences (more than 300 words) in other people's completed papers, with a coincidence rate of more than 80% and no comments. This behavior has reached more than two places.

4. It is basically consistent with the continuous sentences (more than 100 words) in other people's completed papers, and the coincidence rate is over 90%. No comment, this behavior has reached more than three places.