What is the difference between "Discussion" and "AI Discussion" in the mobile discussion area, and how do I switch between them?

1. After entering the "Discussions" page, the tab row at the top has "Discussion" on the left (general discussion list) and "AI Discussion" on the right (AI discussion mode). 2. Click the "Discussion" tab to view the general discussion list; click the "AI Discussion" tab to switch to AI discussion mode. 3. To return to the general discussion list, click the "Discussion" tab again.