How to tell whether a copper coin has an opening or not?

1, first of all, the price is different. Generally speaking, the price of polished copper coins is higher than that of unpolished ones.

2. Then the value is different. Thanks to the blessing of respected people, the collection value of copper coins is even greater.

3. Finally, there are different dress restrictions. Those who don't turn on the light generally have no wearing restrictions, and there are many requirements and restrictions for turning on the light.