Can the live stream room copywriting be modified?

Live stream room announcements can be modified.

You can make unified settings for all live stream room announcements in [Live Streaming > General Settings > Live Stream Room Announcements]. This setting will take effect for all live stream rooms that have not had their announcements set individually (there may be a certain delay before the modified announcements take effect).

You can also set a separate live stream announcement for a single live stream room in [Live Stream Details - Live Stream Decoration - Live Stream Room Information - Live Stream Room Announcement]. This setting will only take effect for this specific live stream room.