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Jack Ma waves to bid farewell at a function to mark the 20th anniversary of Alibaba Group in Hangzhou, capital of east China's Zhejiang Province, Sept. 10, 2019. (Xinhua/Jin Liangkuai)

Jack Ma waves to bid farewell at a function to mark the 20th anniversary of Alibaba Group in Hangzhou, capital of east China's Zhejiang Province, Sept. 10, 2019. (Xinhua/Jin Liangkuai)