I don't understand. Why do fortune tellers just press their fingers?

Some of them are fake. Some of them have some real skills. Pressing fingers means pressing the six bending points of the index finger, middle finger and ring finger. Divided into two rounds to represent the earth branch. 12 wheel represents heavenly stems and earthly branches Jiazi. 1 jiazi is a cycle, 60 years. Life is fixed after birth, but fate can be changed. This is the connection of fate. So fortune tellers can tell you your luck according to your life, so as to avoid misfortune.