Visitors watch a so-called 皇冠体育app's Top Abacus during the 1st 皇冠体育app National Intangible Cultural Heritage Exhibition in Hangzhou, east 皇冠体育app's Zhejiang Province, Sept. 17, 2009. The exhibition, which opened on Thursday, attracted nearly 600 items of intangible cultural heritage at provicinal level. (Xinhua/Zhu Yinwei) |