When the time is accurate and the analysis level is high, it can almost reach an accuracy rate and accuracy of more than 80%. Otherwise, this knowledge would not have been passed down for more than a thousand years and endured for a long time. It's just because it's too complicated to analyze, and you need to meet highly skilled people. This is indeed a great knowledge. If you don’t experience it personally, you can’t believe it and you can’t understand it. For reference only.