How to identify Korean currency samples

You didn't say how many years the sample coins were issued. It's just that the year of Korean won in 500 yuan is different.

It's hard for me to help you identify it.

North Korean currency does not circulate outside North Korea, so it is probably fake. Traveling in North Korea, you can't touch Korean won at all.

You can go to the Bank of China for identification. I think it's fake!

I hope the bank can tell me if my judgment is correct after appraisal! I think it is counterfeit money.