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| Song dynasty |
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| During
the Northern and Southern Song dynasties,coins graded as "Xiaoping",
"Zhe-er", and "Dangshi" were all cast with reign
marks of emperors. Large numbers of "Duiqian" coins were
also produced. Iron coins together with bronze ones were first circulated
in the Southern Song dynasty and tiron coin casting reached its peak
during Jia Ding Reign of the Southern Song dynasty.In the Southern
Song dynasty,excessive release of paper notes led to their devaluation,
so the imperial government in Lin'an (today's Hangzhou) later used
bronze and lead plate coins to replace paper notes.Meanwhile, the
Liao, Jin and Xixia dynasties had their own currency systems and cast
round-with-a-square-hole coins imitating the shape of the Song coins. |
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