This paper explores the green supply chain management (GSCM) of companies based in the Yangtze River Delta, China. The companies' overall GSCM practice level (LGSCM) is measured by using the data from 165 valid respondents in a questionnaire survey conducted during April and May 2009. The relationships between LGSCM and the classified determinant factors are analyzed. It is indicated that Chinese companies are still at a preliminary stage of GSCM practices. Their environmental management in cooperation with external members of the supply chain is very marginal. A company's LGSCM is significantly and positively associated with the external pressures from regulatory, domestic clients and business competitors. As an internal factor, a company's learning capacity greatly determines LGSCM. We also confirm that the internal factors function as intermediate variables of external pressures in influencing a company's GSCM. A company's environmental management capacities will be strongly enhanced by frequent internal training of employees to increase its involvement in GSCM practices. Copyright © 2011 John Wiley & Sons, Ltd and ERP Environment.