With the development of commodity economy

the labor uses of Song dynasty was transferred from free to paid.However

whether it was Fuyi

or it was Zhiyi

this change was a complex process.Yaqianyi was very important in Song’s Zhiyi

whose development path reflected the complicated process.What was more

for this transformation

the government and peasants considered more about accounting the economic cost rather than accepting it reluctantly.Especially for the government

social cost was contained as one of the aches that could not be ignored in system designing process.At the same time

this kind of accounting told us

at the background of government purchase in Song dynasty

the transformation of Yaqianyi was the result that the government and peasants chose.