A model presents green jade diamond ring and earings, which are expected to fetch up to 58 million HK dollars (around 7.4 million U.S. dollars) in Hong Kong, south China, March 20, 2018. Sotheby's Hong Kong Chinese Works of Art Spring Sale Series 2018 will take place on April 3 at the Hong Kong Convention and Exhibition Centre. The series of sales will offer about 300 items with a total estimate of nearly 730 million HK dollars (94.9 million U.S. dollars).(Xinhua/Lui Siu Wai)