An ethnic Qiang woman demonstrates the art of Qiang-style embroidery at the Sichuan Pavilion at Shanghai World Expo park on May 11, 2010. Seven Qiang women from the quake-hit Aba Tibetan and Qiang autonomous prefecture, in Southwest China's Sichuan province, put on the demonstration of Qiang ethnic culture heritage to express their gratitude to the nation, who came together to help them reconstruct their homes after the quake two years ago. [Photo/Xinhua]