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Sounds strange. Programming resources usually aren't blocked here - even when they're on Wikipedia. StackOverflow isn't blocked, and GitHub hasn't been blocked either. E: Excluding Google search I've only encountered one blocked programming resource when sporadically programming on my spare time here: golang.org - which I'm guessing is because it's on hosted on Google's servers.
Does China block specific parts of wikipedia then? How do they know what part of wikipedia you're visiting?
[0]https://en.wikipedia.org/wiki/Censorship_of_Wikipedia#China [1]https://en.wikipedia.org/wiki/Great_Firewall#Blocking_method...