Fortune Telling Collection - Fortune-telling birth date - What does it mean for an ancient fortune teller to stretch out a finger?

What does it mean for an ancient fortune teller to stretch out a finger?

What does it mean for an ancient fortune teller to stretch out a finger? The idiom at the beginning can be used to explain this trick: a son graduated from high school together, became famous in one fell swoop, took the lead, was single-minded, skilled and unique! Can be used to explain the behavior of fingers.