How many ancient times was the money unit birthplace?

All along refers to 1,000 copper cashes

the money note come from the ancient begin from the goods exchange between the human activity, but when start to use "money note" to replace the real "moeny" there still no any certain answer so far. but someone believe china's Yuan Dynasty is the first use the money note to replace the real money in the ancient.

I don't understand what did u mean