Alibaba Jumps 7% After Billionaire Jack Ma Appeared in a 50-Second Video Clip After Weeks of Laying Low Posted byShalini Nagarajan January 20, 2021 Leave a comment on Alibaba Jumps 7% After Billionaire Jack Ma Appeared in a 50-Second Video Clip After Weeks of Laying Low The billionaire founder could be seen addressing 100 rural teachers across China.