An enamel cup made during the reign of Emperor Yongzheng of Qing Dynasty (1644-1911) is showcased at an auction preview of the Christie's on Nov 23, 2016. The cup will go under the hammer with an estimated value of HK$50 million ($6.5 million) at the Christie's 2016 Autumn Auction from Nov 25 to 30. Items in the auction list include masterpieces of Chinese paintings and calligraphy, porcelain wares and handicrafts, as well as jewelries and wristwatches. [Photo/Xinhua]