Will people who look at incense go crazy once?

Guanyin belongs to traditional witchcraft and is also a kind of psychic. But it can't fundamentally solve the problem, it's just a prediction. Forecasting and decision-making are not the same thing. So it won't be crazy.

Most fortune tellers in the society have studied the Book of Changes and the Eight Diagrams, and can skillfully calculate the birth and season, using traditional mathematical methods to calculate.