Operating environment: iPhone 1 1, iOS 14.7, Tik Tok 13.4.0.
1. In the upper right corner of my Tik Tok page, click the icon "Three Horizons".
2. Find "Use the Management Assistant" and click it.
3. Click Content Preferences.
4. Select one of the contents and click it.
5. Pull left and right to set related content preferences, and click the "Finish" button in the upper right corner.