An investor reacts as he checks stock information with a computer at a brokerage house in Hefei, Anhui province Dec 1, 2011. China's benchmark stock index closed 2.3 percent higher on Thursday, the biggest percentage rise in 5 weeks and with banking stocks up sharply, after the central bank announced a cut in banks' reserve requirement ratios (RRR) in a reversal of its recent tight monetary policy stance.[Photo/Agencies]