An investor look at stock information at a trading hall in a securities firm in Hangzhou, capital of east China's Zhejiang Province, Feb. 21, 2013. Chinese stocks plunged on Thursday, with the benchmark Shanghai Composite Index slumped 2.97 percent, or 71.23 points, to end at 2,325.95. The Shenzhen Component Index declined 2.59 percent, or 249.76 points, to 9,396.11. [Xinhua]