It's not GA which is not blocked in China; I think sqlalchemy.org itself somehow ended up on the GFW blocklist (beats me why that would happen).

I'm in China right now, and

    $ curl -v http://sqlalchemy.org/
    *   Trying 45.33.79.102...
    * TCP_NODELAY set

Then it just hangs. Meanwhile, my sites hosted in the same Linode datacenter (Newark, NJ) work fine.