Wu Bangguo (C), chairman of the Standing Committee of China's National People's Congress, China's top legislature, and his wife Zhang Ruizhen (R) pose for a group photo with Dioncounda Traore, president of the National Assembly of Mali, who is here attending the ceremony for the China National Pavilion Day held at the Expo Center in World Expo Park, in Shanghai, east China, Oct. 1, 2010. [Xinhua/Li Tao]