Let me take the latest version 22.4.0 of Tik Tok as an example.
1. Open the "I" interface of Tik Tok, and click "Follow" in the figure (as shown below):
2. Select the blogger who wants to join the fan base (as shown below):
3. Click the "Fan Group" function in the figure (as shown in the figure below):
It can be seen that there is a threshold for joining the group. For example, this blogger has set "only pay attention" and "only pay attention after 7 days" (as shown below):