Fortune-telling dust

Do you think the fortune teller can figure out how many children in the family did it?

It is calculated by eight characters. What's so strange about this? Zhouyi has been handed down to this day, and it has its own magic, but it is too difficult to understand, and not many people understand it. But if you understand that the people around you are ordinary people, you can see everything, others are still in the fog, and you already know the result.