There are 564 million internet users in China including 420 million mobile users

"The China Internet Network Information Center (CNNIC) issued its 31st Statistical Report on Internet Development in China today, in which it found a total of 564 mln internet users in China as of the end of December 2012, and a total of 50.9 mln new internet users for all of 2012. Internet penetration reached 42.1% by the end of 2012, up 3.8% YoY.
China has 420 mln mobile internet users, up by approximately 64.4 mln new users from the end of 2011.
70.6% of Chinese internet users access the internet from desktop computers, down nearly three percentage points from late 2011. 45.9% of internet users access the internet from notebook computers. The percentage of mobile internet users increased from 69.3% in late 2011 to 74.5%.
Rural residents accounted for 27.6% of China's internet users, or 156 mln people, up by approximately 19.6 mln new users from the end of 2011.
The majority of internet users in China are between the ages of 20 and 29, with the percentage of users in this demographic increasing from 29.8% in 2011 to 30.4% as of the end of 2012. The percentage of internet users over the age of 40 grew from 16.2% to 18.6%."
Source:  CNNIC via Marbridge Daily, 15th January 2013