File picture shows a worker cleaning in front of an iPhone 5C advertisement at an apple store in Kunming

Reuters
File picture shows a worker cleaning in front of an iPhone 5C advertisement at an apple store in Kunming
A worker cleans glass in front of an iPhone 5C advertisement at an apple store in Kunming, Yunnan province, in this October 27, 2013 file picture. REUTERS/Wong Campion
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