Jack Ma still Alibaba's 'biggest boss' as Daniel Zhang leaves cloud unit

Jack Ma still Alibaba's 'biggest boss' as Daniel Zhang leaves cloud unit

FILE PHOTO: Jack Ma, billionaire founder of Alibaba Group, arrives at the "Tech for Good" Summit in Paris, France May 15, 2019. REUTERS/Charles Platiau

The surprise resignation of Daniel Zhang as head of Alibaba’s key cloud unit has thrown a spotlight on the continuing influence of Jack Ma over the company he helped found and led for over two decades.