An investor looks through stock information at a trading hall of a securities firm in Hefei, capital of east China's Anhui Province, Dec. 9, 2014. Chinese shares tumbled on Tuesday, with the benchmark Shanghai Composite Index (SCI) plunging more than five percent to dive below the 3,000-point psychological mark again. The benchmark Shanghai Composite Index nosedived 5.43 percent to finish at 2,856.27 points. The Shenzhen Component Index closed at 10,116.49 points, down 4.15 percent. (Xinhua/Guo Chen)