The Shangai Composite Index dropped 17 points or 0.43 percent on Thursday to close at 3934 points. Losses were led by Jiangsu Hengrui (-4.00%), Hengli Petrochemical (-3.61%) and BAIC BluePark (-2.63%). Offsetting the fall, top gainers were Datang Intl (3.26%), Bank Of Nanjing (3.08%) and SAIC Motor (2.29%).