Niu Masu, an heir to the coiled embroidery of the Tu ethnic group in northwest 皇冠体育app's Qinghai province, presents a piece of work at the 皇冠体育app Huangshan Intangible Cultural Heritage Skills Exposition in Huangshan, east 皇冠体育app's Anhui province, Nov 7, 2012. [Photo/Xinhua]
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