DURING the Warring States Period (475-221 B.C.) the state of Qi issued a knife-shaped coin bearing a special inscription, making China one of the first countries to issue a souvenir coin. Up to the...
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DURING the Warring States Period (475-221 B.C.) the state of Qi issued a knife-shaped coin bearing a special inscription, making China one of the first countries to issue a souvenir coin. Up to the...