The article analyses the reasons of the prevalence of private coins-making and the deficiency of copper coins in Tang dynasty in terms of the characteristics of making copper coins.

This dissertation, under the giude of dialectic and historical materilism, according to materials of history and archeology, manages to further research some difficult and uncertain questions:firstly, the question on the number of Wuzhu money in Han dynasty;secondly, the question on coin foundry of privacy ;thirdly ,the question on.

Reasons for Prevalence of Cao Tang Shi Yuin Ming Dynasty;