A volunteer representative waves a volunteer flag at the 100-day countdown ceremony of the 1st China-Eurasia Expo in Urumqi, capital of northwest China's Xinjiang Uighur Autonomous Region, May 24, 2011. Urumqi was engaged in a series of activities marking the 100-day countdown to the 1st China-Eurasia Expo, which will open in the city on Sept. 1, 2011. Once known as the Urumqi Fair, the Expo features commercial, cultural and ministerial interactivities among Asian and European countries. [Xinhua/Wang Fei]