The Shangai Composite Index decreased 14 points or 0.36 percent on Wednesday to close at 3938 points. The decline was led by Yonyou Soft (-3.74%), Datang Intl (-2.87%) and China Coal (-2.18%). On the upside, the strongest performers were China Fortune (3.57%), Hengli Petrochemical (2.00%) and Sdic Power (1.89%).