Sina Weibo and companies. Also, there is a graph and a declaration on its user page to show the verification. There are several kinds of verifications: personal verification, college verification, organization verification, verification for official accounts (accounts of government departments, social media platforms and famous companies) weibo master (people bind the accounts with their phone numbers and their followers). When the number of microblogs reaches a threshold, users can apply for the verification of "Weibo Master". Sina produced mobile applications for various platforms to access Sina Weibo, the platforms include Android, BlackBerry OS, iOS, Symbian S60, Windows Mobile and Windows Phone. Sina
Microblogging in China Twitter, Facebook and Plurk have been blocked since then. Sina.com's CEO Charles Chao considered it to be an opportunity. Sina launched Sina Weibo on August 14, 2009. Its executives invited and persuaded many Chinese celebrities to join the service, which led to strong growth in user numbers. Two other Chinese Internet portals, Sohu and NetEase, launched the beta versions of their weibo sites almost simultaneously, on January 20, 2010. On January 30, another Internet portal Tencent closed its weibo service, Taotao, and started its new weibo service Tencent Weibo on March 5, 2010. Building on the large number of its