SINA Corporation provides online media and mobile value-added services (MVAS) in the People’s Republic of China. It provides advertising, non-advertising, and free services through SINA.com, Weibo.com, and SINA Mobile. SINA.com offers free interest-based channels that provide region-focused format and content, including news, sports, automobile-related news, finance, entertainment, luxury, technology, digital, tools, collectibles, video, music, and wireless application protocol, as well as interactive platform for fashion-conscious users to share comments and ideas on a range of topics, such as health, cosmetics, and beauty. The company's micro blogging platform, Weibo.com, enables its users to follow the hottest topics being discussed online, as well as discussions related to people they know. Weibo accounts consist of celebrities, commercial enterprises, government entities, and grass root Internet users. Its SINA Mobile service allows users to receive news and information, download ring tones, mobile games and pictures, and participate in dating and friendship communities. The company also offers SINA Game, which serves as an interactive platform that provides users with downloads and gateway access to popular online games; SINA eReading, a shop for book reviews; SINA.net, an enterprise solutions platform to assist businesses and government bodies; and SINA Mall, an online shopping Website. In addition, it provides a platform for Chinese bloggers; photo-sharing platform; free email, VIP mail, and corporate email for enterprise users; audio and video-based instant messaging tools; proprietary search technology; and classified advertising services, as well as hosts topic-specific discussion forums in Chinese language; and creates user-maintained and supported online communities. The company has strategic cooperation agreement with China Unicom (Hong Kong) Limited. SINA Corporation was founded in 1999 and is based in Shanghai, China.