The landing page for Sina Corp.'s Sina Weibo microblogging service app is displayed on an Apple Inc. iPhone 5s in an arranged photograph in Hong Kong, China, on Tuesday, April 22, 2014. Weibo Corp., the Chinese microblogging service owned by Sina Corp. and Alibaba Group Holdings Ltd., raised $285.6 million its U.S. initial public offering after pricing the shares at the low end of a marketed range, people with knowledge of the matter said. Photographer: Brent Lewin/Bloomberg via Getty Images