2. After entering the VIP website, enter the keywords of the paper to be retrieved in the input box.
3. After clicking the "Search" button, in the search results list, click the title of the paper to enter the paper introduction page.
4. On the paper introduction page, click the "Download" button.
5. In the pop-up download dialog box, select the storage location of the file, and click the "Download button" to successfully download the paper.