A staff member introduces a blue-and-white palace bowl from the Chenghua Period (1465-1487) of Ming Dynasty (1368-1644) during a preview of Sotheby's Fine Art Chinese Ceramics and Works of Art autumn sales in south China's Hong Kong, Aug. 28, 2013. The auction will be held at Hong Kong Convention and Exhibition Centre on Oct. 8, 2013. (Xinhua/Li Ying)