[Alibaba: Tsai Chongxin will succeed Zhang Yong as company chairman effective September 20)-Alibaba announced on the Hong Kong Stock Exchange that Tsai Chongxin, executive vice chairman of the group, will succeed Zhang Yong as chairman of the company. Wu Yongming, chairman of Taotian Group, will succeed Zhang Yong as CEO of the company. The two appointments will take effect on September 10.