Abstract: In China ancient times in currency history, down to all the money copper steel turtle shell and so on, separately has acted as the currencies, but, looked from the entire currency history development's general trend, Song Yuan before the copper is the most main coin material, but after Song Yuan, the silver becomes the principal currency gradually, the copper cash and the silver coordinates. A Song Yuan time, becomes in the Chinese currency history the silver monetization crucial phase. Taking this into consideration, the academic circle has conducted various research to the Song Yuan time silver monetization question, has obtained a series of important achievements. However, in the north silk road trade and the silver monetization's relational aspect, not yet reaches the consensus until now. Author bold mean, plans to make a preliminary discussion in light of this, asks respectfully to point out mistakes.

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