The chemical compositions and firing temperatures of 74 stamped pottery and protoporcelain fragments which were excavated from Jiangxi, Zhejiang, Henan, and Fujian were studied. Their chemical compositions, together with a database of more than 600 pottery and porcelain bodies and 100 protoporcelain and porcelain glazes previously investigated, were processed and evaluated by correspondence analysis. Their firing temperatures and those of more than 200 pottery and porcelain samples were also compared. The results of this investigation yield a more objective and comprehensive view of the process of technological evolution of ancient Chinese pottery and porcelain than previously possible. The place of stamped pottery and protoporcelain in the evolution process is better understood. The differences between the patterns of continuity and change in the north and the south of China are discussed.