The appearance time is different: the circle appears earlier than the yuan. Different sources: the circle comes from the silver circle, and the unit of some versions of RMB is the circle. Yuan comes from Yuanbao, which refers to the treasure of the Yuan Dynasty. The frequency of use is different: the circle used to be used more frequently, but now it is used less frequently, while the RMB is used more frequently.
Money is a special commodity, which acts as the equivalent of all commodities. Money is the general representative of value. Money (CCY) is a tool to measure prices, a medium to buy goods and a means to preserve wealth. It is a contract between property owners and the market about exchange rights, and it is essentially an agreement between property owners. Including currency and banknotes in circulation.
When the market is in the stage of barter, whether the exchange can take place depends on the complementarity of supply and demand between the two sides. This complementarity does not always exist. Maybe A is short of B and B is short of D. If there are only two parties, then the exchange cannot be carried out.
Assuming that there is C and the other D is short of A, then under a certain agreement, Party A, Party B and Party C can exchange in the form of mutual exchange. This agreement is that B and C agree that A can be exchanged for D, so that he can exchange B for A, although A is not what he ultimately needs, it acts as a medium of exchange.
In this case, the role is extended. A refers to the buyer, B refers to the seller and C refers to the market. It can be C or a combination of internal exchanges. In this way, A acts as money, that is, A buys what he needs with A, while B holds A and exchanges it with C for D. ..
When the exchange takes place in a wider range, the importance of two-way matching of supply and demand between the two sides of the exchange decreases. If the market is large enough, there will always be a possible third party that can provide the missing supply to meet the needs of the exchange. This third party is the market, and the market is the whole including all exchanges.