2. After opening the official website, enter the corresponding text in the search box and click Search.
3. Find the corresponding article and click CAJ file to download, as shown in the figure below.
At this time, you can't open the file. You need to open Baidu, enter "caj Reader" and click Download.
5. After finally opening the CAJ file, you can directly load the downloaded paper or click the downloaded paper. Select "Tools" at the top of CAJ document, find "Character Recognition", select the text to copy, and you can copy the text.