Wu Lingshu (3rd L, front), an inheritress of the blue calico handicraft, teaches college students how to engrave designs on board at the Blue Calico Museum in Nantong, east China's Jiangsu Province, July 15, 2015. College students came to the Blue Calico Museum to experience the handicraft of making blue calico during their summer holidays. (Xinhua/Huang Zhe)
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