Microblogging in China website. In February 2011, Tencent announced that its weibo registrations had exceeded 100 million. This threshold was officially passed by Sina Weibo in March 2011. However, according to iResearch's report on March 30, 2011, Sina Weibo took a commanding lead over its competitors, with 56.5% of China's microblogging market based on active users, and 86.6% based on browsing time. According to the China Internet Network Information Center, in the first half of 2011, Chinese weibo users increased from 63.11 million to 195 million. By July 2011, 40.2% Chinese Internet users and 34.0% Chinese mobile Internet users used weibo/microblogs. In Dec
Sina Weibo Sina Weibo. Posts on politically sensitive topics are deleted after manual checking. Sina Weibo is believed to employ a distributed, heterogeneous strategy for censorship that has a great amount of defense-in-depth, which ranges from keyword list filtering to individual user monitoring. Nearly 30% of the total deletion events occur within 5–30 minutes, and nearly 90% of the deletions happen within the first 24 hours. On 9 March 2010, the posts by Chinese artist and activist Ai Weiwei at Sina Weibo to appeal for information on 2008 Sichuan earthquake going public were deleted and his account was closed by website's administrator.