We talked several times about Alibaba, Chinese e-Commerce Giant, competing with Chinese and American firms. Their accounts are not public because the firm is still private even though an IPO is coming (maybe Q4 2013).
They announced buying a stake into SinaWeibo (other previous investments in social services were Xiami and Momo)
The Wall Street Journal investigated on their mobile strategy:
Alibaba is looking for partners but objections of Google controlling Android. Handset makers would like to join Alibaba but doesn’t want to harm their existing relationship with Google.