The copy ratio of excluding my own documents refers to the proportion of references cited in my paper copied from the content of my paper. Generally, the proportion should be controlled within a certain range, not exceeding 30%. If the copy ratio of excluding my certificate is less than 15%, it is generally considered qualified. However, the specific eligibility criteria may be different due to academic fields, academic norms and institutional regulations. I suggest you consult the academic norms or regulations of your field or institution to ensure that your academic behavior meets the requirements.