The Composition of Coins and the Economic Role of the Exchange Rate of Southern and Northern Coins during the Song,Liao,Jin,and Yuan Dynasties
After the Chanyuan Alliance,the northern regime represented by the Liao and Jin Dynasties and the southern regime represented by the Song Dynasty began a long-term trade.There will inevitably be exchange rate issues in trade,but the exchange rate of coins in the north and south has always been a problem that is difficult to solve in the study of currencies in the Liao,Song,Jin and Yuan Dynasties.At the same time,Liao and Jin first-year money is too scarce compared to Song money,making it diffi-cult to reflect the role of Liao and Jin first-year money in the economy.The analysis of coin composition provides a breakthrough to solve these problems.This paper analyzes the exchange rate of the northern and southern coins in the Liao,Song,Jin and Yuan dynasties from the perspective of component analysis,and based on the exchange rate of the northern and southern coins in the Liao,Song,Jin and Yuan dy-nasties,explores the role of the Liao,Jin and Yuan Dynasty coins in the regime.