For many months I've been waiting to see the PR3 status of one webhost review blog restored to its original PR. Yet, until now, the PR remains 0. I wonder what did you do in order to gain PR after losing it?
Your site has been banned by google and you have lost your page rank as a result of this. Most sites that lose their page rank losses it because they violet google's rules. You should review google's rules then thoroughly check your site to see where you went wrong. Once you have found what you did wrong you must correct it and if you do not already have an account at google webmaster tools you should create one. Login to google webmaster tools and submit a reconsideration request. Hopefully google will re-index your site if you do this.
Thanks for your insight. The site is well-indexed by Google. In fact, it will only take seconds after posting a new article for Google to index this site. All pages of the site are currently indexed. The one thing that I've been wondering is that the PR remains 0 despite the fact that it already has lots of backlinks.
No blackhat. No bad strategies. All techniques were done according to Google's rules. I just wonder why I lost it for nearly a year already.