According to the China Internet Network Information Center, at the end of 2012 the population of China with access to the Internet had surpassed the half a billion mark. In total, some 513 million people now access the web in some form across China.
Even so, Chinas uptake of the Internet is well below the U.S. and its only the sheer number of people there that makes the half a billion figure possible. Internet penetration in the U.S. has reached 78.2%, where as China only enjoys 38.3 percent.