Group settings
In a Lark session, the group owner can set a variety of session attributes:
Only admin can edit group info
Only admin can add new group members
Group members can share this group with other chats and Docs.
Only admin can mention @All
When someone joins group, only notify the admin
When someone leaves the group, only notify the admin
Click "..." - [Group settings] in the upper right corner of the session. Take the setting of the new member into the group notification as an example: