High Quality Content by WIKIPEDIA articles! The economy of China under the Song Dynasty (960–1279) of China was marked by commercial expansion, financial prosperity, increased international trade-contacts, and a revolution in agricultural productivity. Private finance grew, stimulating the development of a country-wide market network which linked the coastal province with the interior. The Song economy gave rise to an enormous population explosion, stemming from increased agricultural cultivation in the 10th to 11th centuries that doubled China`s overall population, which rose above 100 million people (compared to the earlier Tang, with some 50 million people).