What is the difference between hexagrams and Kangxi coins, Kangxi or Qianlong?

I don't think there is any difference in methods between hexagrams and Kangxi coins. But in practical application, it is generally better to use dry dragon coins, because dry dragon coins have higher copper content and purer quality, and they can communicate with people's hearts better when divining, and divination can better reflect what they want to ask, so it is better for reference only.