Can be seen from the earnings, the vast majority of Baidu's revenue sources from the network marketing income of 22.246 billion yuan, an increase of 53.5% from 2011. Baidu network marketing of substantial revenue growth, mainly due to the increase of the number of active online marketing customers and each customer revenue. Reported fourth quarter of 2012, Baidu total revenue of 6.335 billion yuan, a year-on-year growth of 41.6%; net profit of 2.795 billion yuan, a year-on-year growth of 36.1%. Baidu announced Reported full year 2012 total revenue of 22.306 billion yuan, representing an increase of 53.8% over 2011. The full year net profit of 10.456 billion yuan, representing an increase of 57.5% over 2011. Baidu Chairman and CEO Robin Li pointed out that in the past quarter, Baidu Desktop Search business growth is relatively weak, it is expected that the trend will continue next year, the most important mobile strategy, mobile search, and therefore are actively to invest in these areas.