chapter 669 not mentally ill

A few years ago, it was reported in the news that a young man who was less than twenty years old went mad at home, hacked people with a knife, killed his mother by mistake, and blinded his father in one eye. At that time, this incident was widely concerned. Later, the young man was sent to a mental hospital, and he has only recently improved. Everyone was surprised immediately. What's going on, how can a mental patient come over? What if someone is hacked at the scene? The audience in the...