Smart circuit diagram: What does wisdom line mean by disconnection?

Several explanations of wisdom line fault;

1, wisdom line disconnector.

When wisdom line is disconnected and wisdom line is obviously interrupted, people will encounter sudden illness and even death in middle age.

2. wisdom line is disconnected and reconnected within three millimeters.

If wisdom line is disconnected and wisdom line is disconnected and reconnected within three millimeters, the head will cause some obstacles or suggest that the head will be injured, so be extra careful.