Sina Weibo in China. Sina Weibo is a service website launched by sina.com to provide microblogging services. Users can send messages and multimedia messaging service through the website and the App, and they also can upload pictures and videos to the public for instant sharing. Users can directly add comments, pictures, and videos under in the comment section. Sina Weibo is a platform based on user relationships to share information, to disseminate information, and to get information. Sina Weibo invited a huge number of stars and celebrities to join the microblogging at the beginning. But now, it also invites many media workers,
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.