The duplicate checking rate of undergraduate thesis is within 30%, and the minimum standard for duplicate checking of undergraduate thesis in colleges and universities in China is 30%. However, some excellent universities, especially 985/2 1 1, require that the duplicate checking rate of undergraduate thesis should be less than 20%, while the duplicate checking rate of excellent undergraduate thesis should be less than 10%. Students are advised to use cnkitime's free website to check academic misconduct papers. The undergraduate edition (final graduation thesis), master edition (final graduation thesis) and periodical title edition (periodical contribution and title evaluation) can be checked indefinitely.