SINA Corporation operates as an online media company and information services provider in the People’s Republic of China. It provides region-focused online portals, MVAS, search and directory, interest-based and community-building channels, free and premium email, blog services, audio and video streaming, online games, classified listings, fee-based services, e-commerce, and enterprise e-solutions. The company operates in five business lines: SINA.com, SINA Mobile, SINA Community, SINA.net, and SINA E-Commerce. The SINA.com business line offers advertising products, including banner, button, and text-link advertisements; promotional sponsorships that are event-specific; and advertising campaign design and management services. The SINA Mobile business line provides mobile value-added services through products, including content downloading, subscription to dating services, and mobile games on various platforms, such as short messaging service, multimedia messaging service, wireless application protocol, interactive voice response system, and color ring back tone. The SINA Community business line includes SINA Blog, a platform for Chinese bloggers to read and publish original writings; SINA Podcast, which allow users to upload, publish, and manage their audio-visual information; SINA Mail that offers free email, VIP mail, and corporate email for enterprise users; SINA Circle, which enables users to form communities on the Web; SINA BBS that hosts topic-specific discussion forums in Chinese language; and SINA Post-it designed to allow free posting of advertisements for individual and enterprise users. The SINA.net business line serves as an enterprise solutions platform to assist businesses and government bodies to engage, communicate, and transact with their audiences through Internet. The SINA E-Commerce business line offers SINAMall, an online shopping Web site. The company was founded in 1997 and is headquartered in Shanghai, the People’s Republic of China.