The standard of duplicate checking rate of English papers varies according to the requirements of schools and periodicals. Generally speaking, the requirement of undergraduate English thesis is below 30%, master English is below 20%, and doctoral thesis is not higher than 10%. Therefore, it is best to control the duplicate checking rate of English papers below 20% to ensure that it meets the requirements of most schools and periodicals.

The requirements of duplicate checking system and duplicate checking rate will vary from school to school and from periodical to periodical, so the author should read the relevant requirements carefully, and write and duplicate check according to the requirements.