Two man visit an achievement exhibition, a sideline of the 10th annual meeting of the China Association for Science and Technology (CAST), in Zhengzhou, capital of central China's Henan Province, Sept. 17, 2008. The annual meeting, attracting more than 10,000 scientific workers including over 100 academicians of the Chinese Academy of Sciences and the Chinese Academy of Engineering, kicked off on Wednesday. [Xinhua]