First, open the main page of China HowNet, click the "Journal" tab, and then click "Advanced Search"; You will be taken to the search page. At this time, "source categories" will appear on the search page, including "sci, EI, core journals and cssci". Just click on them according to your needs.

Today, I found that after I directly opened the homepage of China HowNet, I directly clicked Advanced Search, and found a "Literature" tab in the upper right, which is a drop-down menu. You can directly select search journals, dissertations and other different categories. Of course, journals can also choose the source category and choose CSSCI. At the same time, it is convenient for us to switch between different search methods.