There are more than 500 million mobile internet users in China

"China's internet user base reached 618 mln in 2013, up 53.58 mln from the end of 2012, according to the China Internet Network Information Center (CNNIC). Internet penetration reached 45.8% in 2013, up 3.7 percentage points from the end of 2012.
China had over 500 mln mobile internet users at the end of 2013, up 80.09 mln from the end of 2012. The percentage of internet users accessing the internet through a mobile handset increased to 81.0% during the period, up from 74.5% at the end of 2012. Among 2013 internet users, 69.7% used desktop computers to access the internet, down 0.8 percentage points from the end of 2012. 44.1% of internet users accessed the internet through laptop computers, down 1.8 percentage points from 2012.
Rural residents accounted for 28.6% of China's internet users during the year, or 177 mln people, an increase of approximately 21.01 mln users from the end of 2012. China's village-level internet penetration rate was 27.5% in 2013. The internet penetration rate in Chinese towns was 62.0%.
The percentage of internet users between the ages of 20 and 29 was 31.2%, up 0.9 percentage points from 2012. The percentage of internet users with monthly incomes between RMB 2,001 and RMB 3,000 was 17.8%. The percentage of internet users with monthly incomes between RMB 3,001 and RMB 5,000 was 15.8%. The percentage of internet users with monthly incomes of RMB 500 or less was 20.8%."
Source:  CNNIC, via Marbridge Consulting, 16th hJanuary 2014