How does Ningyang tell fortune?

There used to be a blind old man in Bancun, a water park. His fortune-telling was accurate and his fees were not low. It took three hours from 6 am to 9 am. As long as it's your birthday, you won't be asked any other questions, but you're dead.

I don't want to listen to other fortune tellers for the time being, asking you this and asking you that!