First, open HowNet, search the titles of related papers you want to download, find the papers you need, and find the preview on the right, as shown in the figure below:
However, one disadvantage of reading the paper this way is that if you are not a registered member of HowNet, you can't read the whole paper.
If you want to read the whole paper and don't want to pay for it, you can only download it. When downloading, click on the title, first open the paper, then find the download at the top (caj or pdf can be used) and click Download.
When using caj format, you need to download the paper reader dedicated to HowNet, find the download reader above and download it. Sometimes you can't download it, you can search and download it in Baidu.
Look at the pictures after downloading, and the effect is quite good.