Did you try using a proxy? If CN is anything like NA, chances are they are exclusive. I mean that, they only allow people within their region to play. NA doesn't allow people to play outside the NA region; however, EU players still play NA because they are using proxies.
I'm not to knowledgeable on the whole proxy deal as I haven't ever needed to use one for these purposes. You could try asking @Nico or someone else who has experience with using proxies for Vindictus.
Additionally, you could try viewing the Vindictus Tutorials section. I found a tutorial on using proxies here.