BIG FANG----I found 6 of those Chinese cash coins in a "coin spill" last fall at an old site we were hunting in NV. They were up under a bush and pretty much stuck together, I didn't know what I had at first. The wife carefully cleaned them and they cleaned up nicely. Looks like they might be made out of brass?? I figured they must have been lost by one of the Chinese workers from one of the old gold camps. Neat coins, huh! Take care, Del