Photo taken on May 23, 2014 shows a chinaware from Yongle period(1403-1424) of the Ming Dynasty (1368-1644), estimated to fetch between 30 million to 50 million Hong Kong dollars, during the preview of Christie's Hong Kong 2014 spring season in Hong Kong, south China. The auction will be held from May 24 to 28. (Xinhua/Li Peng)