File photo illustration shows Sina Corp's Chinese microblog website "Weibo"

 
File photo illustration shows Sina Corp
The logo of Sina Corp's Chinese microblog website "Weibo" is seen on a screen in this file photo illustration taken in Beijing September 13, 2011. Sina Corp on May 16, 2012 sounded a bearish note for the coming quarters, warning that further losses may lie ahead because of increased investment into its microblogging platform Weibo, China's version of Twitter. REUTERS/Stringer/Files (CHINA - Tags: SCIENCE TECHNOLOGY BUSINESS LOGO)