Matt Hansen (R) from America learns the facture of porcelain of ancient China's Ding Kiln, originated in the late Tang Dynasty (618-907) and ended in the Yuan Dynasty (1271-1368), which located in northern China's Hebei Province, in Shanghai of China, May 15, 2010. The event of "Hebei Week" was held during the World Expo in Shanghai to diaplay various kinds of folk craftwork in this northern province to visitors. [Xinhua]