Alibaba's stock declined by over 4% in Hong Kong after former CEO Daniel Zhang resigned, raising concerns about the company's cloud unit spin-off and potential discord among top executives. Eddie Wu, the new CEO, will also take over as acting CEO and chairman of the cloud unit, which has experienced weak sales growth and plans to go public next year. Analysts have mixed reactions to Zhang's departure, with concerns about disagreements among partners and implications for the planned spin-off. The cloud unit experienced a 2% drop in revenue in Q1 2021, but analysts believe Alibaba is still China's leading cloud provider.