Well after looking for a way to play the single-player offline. I found out there is some-what of a cracked server.. I don't really know how to explain this. But for what I know you can play via LAN, Single Player and multiplayer. I am downloading it at the moment but it has alot of positive feedback and I will give my opinion on it while I got it working.
Its call StarFriend, the official english site is this -
http://www.battle4sc2.comAnd the official Chinese is this -
http://www.battle4sc2.comHere is an installation GUIDE (on multiple languages, just choose yours) -
http://www.battle4sc2.com/wiki/index.php/Main_PageIf you are planning on using it. Mention it here so we MIGHT be able to play together
Edit: I confirm this working. I can play single player campaign
checking for MultiPlayer now.