The so-called Yuan Datou Yin and Yang refers to the wrong version of Yuan Datou. Yin and Yang refers to the normal convex head of Yuan Shikai on one side and the concave head of Yin on the other. This kind of silver coin belongs to the wrong edition, which is caused by using the wrong steel mold when the machine presses the silver coin, and the existence is very small.

Wrong version of currency, full name of wrong version of RMB. Refers to the items with wrong template design, such as reversed pattern, wrong assembly, code overlap, etc. The "defective products" caused by currency quality defects can only belong to residual coins, not to wrong editions. It is worth noting that the wrong version of RMB is not the same as counterfeit money, and the wrong version of RMB can also be circulated in the market.

Yuan Datou was one of the major currencies in circulation during the Republic of China. "Yuan Datou" is the common name of Yuan Shikai's series of coins. To be precise, it is called "Yuan Shikai's elephant carrying golden harvest silver coins". In order to rectify the currency system, the Beiyang government drew a silver coin.