Copper coin fortune-telling sound effect

Why do you use three copper coins to tell your fortune?

When the six hexagrams are played, the flower face of the copper coin is used as the back and yang, which is the image of yang and simplicity; Literally, it is yin, which is an image of yin and qi. With three coppers, you can take the principle of three things and change things. Therefore, no matter which country's coins are, you only need to choose the yin and yang of the coins according to the principle of clearing the air, rising the turbidity and falling the air, that is, the face with few words or no literal words is yang, and the face with many words is yin. Knowing the yin and yang of coins, you can start playing hexagrams.