First of all, there are people who are afraid of murderous look and those who are healthy, in sharp contrast. One is right and the other is evil. Only those who have killed people have murderous look. Healthy people estimate that there is no society now, and Bao Gong in ancient times was also healthy. The boy's urine and the blood on the tip of the tongue are the most yang-gathering places in the human body, which can kill ghosts. Taoist priests usually bite the middle finger or the tip of the tongue.

So in a dangerous moment, the first thing to do is to bite the tip of your tongue and spray blood.