Chinese Vice Premier Wang Qishan (2nd R), Chinese State Councilor Dai Bingguo (1st R), U.S. Secretary of State Hillary Clinton (2nd L) and Treasury Secretary Timothy Geithner pose for a group photo before the fourth round of the China-U.S. Strategic and Economic Dialogue in Beijing, capital of China, May 3, 2012. The fourth round of the China-U.S. Strategic and Economic Dialogue was opened Thursday in Beijing. [Xinhua]