Precious minerals are on display at the China Mineral & Gem Show (CMGS) in Chenzhou, Hunan province on May 19, 2016. The event attracted more than 400 overseas sellers. The expo, officially known as the China (Hunan) Mineral and Gem Show, is the largest of its kind in Asia. It offers 2,300 booths of international standard in four major halls with a total space of 130,000 square meters this year, according to officials in Chenzhou. (Photo: China News Service/ Yang Huafeng)
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