China market, web portals of online advertising services generated total revenue of 4.56 billion yuan. In the China market, web portals of online advertising services generated total revenue of 4.56 billion yuan (US$572.6 million) in 2006, rising over 41% from 2005.

Sina, Baidu, Sohu, Yahoo! China, and NetEase were the top five web portals in 2006, together capturing about 70% of the total revenue. 2007 total sales revenue is predicted to be 5.645 billion yuan (US$724 million), growing nearly 24% from 2006.

The proportion of total sales revenue for keyword-search advertising is on the rise, from 29% in 2005 to 34% in 2006 and further to 36% in 2007,Baidu will surpass Sina to become the largest online advertising web portal.