The Shangai Composite Index fell 12 points or 0.29 percent on Friday to close at 3931 points. Leading the losses are Sanan Optoelectron (-4.68%), Aluminum Corporation of China (-1.63%) and Shanghai International Port (-1.45%). Top gainers were Poly Real Estate (3.54%), Yonyou Soft (3.23%) and Kweichow Moutai (2.62%).