There are 485m internet users in China

"The number of Internet surfers in China increased to an estimated 485 million as of the end of June 2011, according to the latest semiannual survey conducted by China Internet Network Information Center (CNNIC).
The number of Internet surfers rose 6.1% from half year ago and was equivalent to a user density or penetration rate (divided by population) of 36.2%, CNNIC indicated. Of the Internet surfers, 389.77 million used broadband fixed-line access modes (xDSL, cable modem, fiber-optic and dedicated line) at home and 317.68 million used handsets for mobile access. The average time spent using the Internet was 18.7 hours."

Source:  Data from the CNNIC, reported by DigiTimes, 12th August 2011