Why can some Jianghu fortune tellers tell the detailed information of the calculated person? Such as: how many people are there in the family, what are they doing, how old they are, etc.

It's simple. He usually tests you, asks you questions, and then gives vague answers. Even if he is wrong, he can hide it smoothly. You can guess almost by the expression, mainly to lure you to believe him. Once one or two things are right, he specializes in this direction.

Generally speaking, it is easy to read some psychological books and add some speaking skills. Keep giving you psychological hints with some words to make you believe him. Once you are right, you will feel very proud, and gradually you can get words out of him.

What you do can be seen from clothes, dressing, skin and face of hands and body. 100% is calculated without any psychic force, and generally speaking, you should try to speak step by step, not directly, what is your occupation?

Also, if it is introduced by a friend, he will usually ask your friend before the introduction. Is there anything else he doesn't know?

They sometimes make mistakes. Once they are wrong, the big deal is that my business is good. Most fortune tellers still believe in these things. Even if they are wrong, some of them are ashamed or afraid of being cursed by fortune tellers, but they are in no hurry to expose them and walk away.

In short, anyone can become a fortune teller by studying psychology and observing people's clothes and other details.