A Blue Glazed Cup [Photo/ english.cguardian.com]

Blue glazed porcelain, originating in the Yuan Dynasty, was often used by the Qing Imperial family. The blue glazed, yellow glazed, red glazed and white glazed porcelains acted as sacrificial offerings in ancient China. The blue glazed wares were exclusively used to worship heaven. Moreover, blue glazed porcelain was also widely used to furnish the imperial house during the Qing Dynasty.