The URL http://t.cn currently has a web reputation of -6.2 (on a scale reaching from -10 to +10). We block pages with a reputation of -6.1 and lower. As soon as the web reputation of that side improves you will be able to access it again. However, we can not directly influence the accessability of a particular webpage.
You might inform the provider of the page about the problem, so they can take action to improve their reputation again.