UC instant messaging service was officially launched in 2002, through which users can send text messages, images and sounds in real time on the Internet and mobile communication networks. UC also provides community functions, such as chat rooms, online games, alumni records, online karaoke and other entertainment services. UC instant messaging tool has about 80 million registered users, and the highest online number is about 200,000.

Sina acquired UC business in 2004 and paid $65,438+0,500,000 in cash and stock as the down payment. The balance will be paid in cash and stock in the second year according to the growth of performance, with a maximum of $265,438+$0,000,000.