(In 2009, the overall investment of China's mobile advertising business was 630 million yuan. It is estimated that by 2012, the mobile advertising business design will exceed 3 billion yuan. The factors driving the growth of mobile advertising business include: the rapid increase in the penetration rate of mobile terminals, especially smart terminals, the continuous enrichment of mobile Internet content and services, and the continuous improvement of online experience to promote the exponential growth of the number of mobile Internet users and the time spent online. The mobile advertising business is innovative.)