What are the rules for giving money to fortune tellers?

How much is fortune telling? How much is optional or mandatory?

Hello, a fortune teller is at your service. The reward for fortune telling is generally determined by fortune tellers. Some rural areas are 12 yuan, representing 12 months, and some are multiples of 12. Of course, big officials or rich people must give more, ranging from one to two thousand to thousands. Some masters are different according to the time of conversation. You can check in advance.