Photo de stock - Jack Ma, founder and CEO of the internet company Alibaba Group, gestures during his speech at the opening of the Cebit 2015 in Hannover, Germany, 15 March 2015. CeBIT, the world's largest computer expo, opens in Hannover, Germany, on 15 March 2015. Photo:  OLE SPATA/dpa | usage worldwide. - Hannover/Lower Saxony/Germany

Photo de stock: Jack Ma, founder and CEO of the internet company Alibaba Group, gestures during his speech at the opening of the Cebit 2015 in Hannover, Germany, 15 March 2015.

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