How much is the batch of eight characters?

It is said that the general "batch of eight characters" is only a simple batch, and it will take a long time if it is really good. But this kind of opportunity is generally not found. Because the fortune-teller on the street really doesn't know much, even if you ask an expert, he won't give you a detailed calculation. Because the calculation is meticulous, it is a "missing machine", which will damage his longevity.

So, for a 10-20 bill, just calculate and listen. What's specific? Get yourself three coppers, and count them as six. Algorithms and hexagrams can be found online.