There are many other "official" jquery CDNs (well, there is a real official one by jquery powered by someone else, and there are Google/Microsoft/etc. ones which are listed on: http://jquery.com/download/). Just don't use the Google one and you're ok. If you're worried about future blocks, just keep monitoring (there are services that tell you if a domain is blocked in China or not), and switch your jquery CDN if one is blocked. Microsoft one is almost surely going to be OK (at least for a long time).