SINA Corp. engages in the provision of online and mobile media services. It operates through the following segments: Portal Advertising, Weibo, and Others. The Portal Advertising segment offers automobile, fast-moving consumer goods, Internet, financial, information technology, and telecommunication services. The Weibo segment focuses on the marketing and development of the social media platform, Weibo. The Others segment includes mobile value added services; and other services. The company was founded in March 1999 and is headquartered in Shanghai, China.