Microblogging in China 2010, it had been, respectively, 13.8% and 15.5%. In July 2009, Chinese microblogs were severely curtailed when most of the domestic weibo services such as Fanfou were shut down. But it brought the birth of others, such as Tencent Weibo and Sina Weibo, operated by large Chinese Internet companies. Sohu Weibo and NetEase Weibo were suspended in July 2010 under the order of the Chinese administrators. Weibo is now operated as a "beta version", enabling the user to circumvent prohibition. Due to the Internet censorship in China, all of the China-based weibo services are now controlled by various self-censorship policies
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.