A circle has a sum on it. Is it a coin?

Friendly; What has the word "He" on it is a series of commemorative coins with the word "He". This kind of ordinary commemorative coin has the same function as the current coin and is equivalent to the coin with the same denomination.

The background of the word "harmony" issued by the central bank is the proposal of a harmonious society. The calligraphy series of "He" is divided into five groups: seal, department, line, block and grass. The word "He" issued this time is the fourth group. When the third group of "He" coins appeared last year, the face value changed from 1 yuan to 5 yuan, and the circulation increased from100000 to 50 million. This time, the fourth group of "He" coins expanded again, and the circulation increased from 50 million to 70 million.

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