A staff member of auction house Christie's shows a pair of Qing Dynasty (1644-1911) porcelain bowls created during the reign of Emperor Yongzheng (1678-1735), at a media preview on April 11, 2019. The Christie's Hong Kong Spring Auctions 2019 will be held in Hong Kong from May 24 to 29. Those to go under the hammer include several treasured porcelain and handcraft works from ancient China, each estimated at more than HK$10 million ($1.2 million). [Photo/Xinhua]