The imperceptible guided news flow and topic intervention in online social media seem to still confine public groups in seemingly transparent privatized areas.

People are easily guided by public opinion and try to show their authority by joining the discussion as a contributor to the public discussion.

But the freedom of speech brought by conformity sometimes has two sides.

The seemingly uni fied surface is just for the compromise brought about by the group, and the secret voice is still the carnival of small groups.

Public group is imprisoned by the unknown but still believes that they have freedom of speech.

People blindly follow the same point of view as if bricks without adhesive are barely stacked.