Hi GreatFire,
Your competitor has a much stronger site in the following two main areas:
- More backlinks (resulting in a higher PR)
- More social mentions
Focus on building more backlinks by researching your competitors domain with Open Site Explorer and MajesticSEO. Keep up your activity in your social circles, and also get going with Google+ if you haven't already.
You should also fix your title tag to include the target keyword at the start - not at the end. So it would read something like 'Great firewall of china - bringing transparency from greatfire.org'
Looking through your site you don't appear to have that much content (this was also mentioned in your Google Support thread) so I would focus on building out the content on the homepage and also further developing your blog. For example your 'Wukan Blocked only on Weibo' blog post is not really long enough to generate you much referral traffic. Larger authority articles of 1000+ words plus with richer content (link references, pictures, Google+ author/social connections) etc will help you far more.
Conduct the relevant keyword research for your blog posts in the same way you did with your root domain. This will keep your website niche focused and generating lots of similar 'china firewall' terms.
Hope that helps.
Cheers,
Andrew