Two children look at a device which can predict sunny and rainy days during the 2013 Shanghai International Science and Art Exhibition Program in East China's Shanghai, Aug 28, 2013. The six-day event kicked off at the Shanghai Exhibition Center on Wednesday. [Photo/Xinhua]

A girl reads a children's book during the 20th Beijing International Book Fair on Aug 28 in Beijing, capital of China. Over 2,000 publishers from 76 countries and regions took part in the fair.[Photo/Xinhua]