German President Horst Koehler (C front), and Yu Zhengsheng (R front), member of the Political Bureau of the Communist Party of China (CPC) Central Committee and secretary of the CPC Shanghai Municipal Committee, attend the celebration marking the National Pavilion Day for Germany at the World Expo park in Shanghai, May 19, 2010. [Xinhua]

A child, sitting on the shoulders of an adult, waves German national flag as they participate in the celebration marking the National Pavilion Day for Germany at the World Expo park in Shanghai, May 19, 2010. [Xinhua]