Users enter ki.cn/ in Baidu browser, enter HowNet to check official website, click the place shown below on the homepage of duplicate checking, and then users need to choose the appropriate duplicate checking system according to their own paper characteristics.

Before selecting a duplicate checking system, users need to carefully check the descriptions in each duplicate checking system. For example, when checking the duplicate of undergraduate thesis, users need to choose the duplicate checking system of CNKI undergraduate PMLC, and the number of words in the thesis should be less than 60,000 words, otherwise the thesis cannot be uploaded correctly.

Take the uploading of undergraduate thesis as an example. After entering the duplicate checking system, users need to fill in all parts as shown in the figure below. Users need to pay attention to the fact that the size of the uploaded paper file cannot exceed 30M and the number of words in the paper cannot exceed 60,000 words, otherwise it cannot be uploaded correctly. After all input is completed, the user can click the submit test button.

Users enter the payment interface and use Alipay or WeChat to scan the code to get the order number. After the payment is successful, the duplicate checking system will automatically detect the paper, and the user needs to wait for about 30 minutes (it may take one or two hours during the peak period).

As shown in the figure below, users need to click Select to download the test report, enter the order number or reserved mobile phone number, and click the query report button. If the test is completed at the bottom, the user can click the download button, and the test report is a compressed package, which can be opened normally after decompression.