A staff member tests the facilities to produce artemisinin at a company in Rong'an County, south China's Guangxi Zhuang Autonomous Region, Oct. 9, 2015. Rong'an county, considered as a major artemisinin production base in China, has cultivated artemisia annua with an area of 10,000 mu (667 hectares) and produces 50 tonnes artemisinin a year. (Xinhua/Tan Kaixing)
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