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A perfume maker shows how to use an incense burner during the International Perfumes and Cosmetics Exhibition in Kuwait City, April 3, 2018. (Xinhua/Nie Yunpeng)
 
 
A perfume maker shows how to use an incense burner during the International Perfumes and Cosmetics Exhibition in Kuwait City, April 3, 2018. (Xinhua/Nie Yunpeng)