1. First, open Baidu search engine, enter the words "Webofscience", click Search, find the words displayed in the search results, and click Enter.

2. After entering the homepage of "Webofscience", enter the paper keywords to be searched in the search bar and click "Search".

3. In the search results, find the title of the paper to be queried, and click the title of the paper.

4. Find the corresponding button in the position shown in the figure, and click to select the option of "Save in other file formats".

5. In the pop-up dialog box, we select the file format to be sent as "HTML" and click the "Send" button.

6. Next, choose the location to save, and remember that it must be a location where you can find it.

7. The last step is to open the saved "HTML" file, and the number after "UTWOS" in the last line is the index number of the document.