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A staff member demonstrates rubbing with imprinted bricks during a folk custom festival in Qingdao, east China's Shandong Province, Feb. 4, 2018. (Xinhua/Li Ziheng)
A staff member demonstrates rubbing with imprinted bricks during a folk custom festival in Qingdao, east China's Shandong Province, Feb. 4, 2018. (Xinhua/Li Ziheng)