Did the master ask the birthplace in eight characters? Why do some masters calculate the birthplace of eight characters?

This is only used for psychic calculation, not just eight characters, names, places of birth, etc. Because of this, you can see your past and future with props. Not only eight characters, but also constellations and gossip. In Jianghu, you don't use the palm, but use the eight characters. This is a liar. Thank you?