Fortune-telling quantity refers to fortune-telling methods.

There is a fortune teller who can calculate your surname and your fortune by measuring your fingers without asking your birthday. Really figured out my last name, didn't you?

There is also a prophecy that has been lost in recent decades and was written overnight. The eight characters calculated the next day were approved the night before, and the date of birth, including name and gender, was calculated. It is not a legend that the number of eight characters per day is limited to 12. I believe that people in China are still relatively hidden, and this kind of craft has not been lost anywhere.