By focusing on the production and circulation of Yunnan copper in the eight
eenth century, this article investigates the important facets of economic d
evelopment in Late Imperial China. The growth of long-distance trade in Chi
na is tremendous from the sixteenth to eighteenth century, as some new rese
arch have proved. "Traditional" Chinese trade expansion do not necessarily
lead to "modern" economic development; for example, some scholars diagnose
its nature as extensive but not intensive growth. What does "traditional" C
hinese trade expansion experience really mean? I will scrutinize two aspect
s of this experience: 1.) the relation of government and market, 2.) the ch
anges in the understanding of "interest."