Random dc's don't really happen much more often than compared to other games I play.
Party in chinese is zu. You can say "qing zu wo" please party me, or just say "zu wo" party me, "zo bu zu" party or don't party me (question form in chinese) and the short version of that one is the one the guy said before, "zu bu". Add your level if you like, they'll understand. Just be polite

if you want, say "xie xie" afterwards as thanks.
This is the chinese server, but you needn't do anything fancy. After you register you just:
1. download the client from

unzip it anywhere
2. download the patch (it's NEW, updated the day before last)
btw, I haven't been on since the newer patch, but they mention adding another server (3). Also if you play during our mornings, especially on weekdays (for those of you in the Americas, east coast that's around 12 hours ahead of you... I forget with daylight savings, we don't do that over here... and west coast that's 15 hours or so), you WON'T get a queue, or at least a very short one (around 20 queue).
Edit: Yep, they've added a 3rd line. I haven't tried it yet, though I've heard it isn't very stable... though this might be because it's coming from people from so far away. I'll ask some chinese players about it sometime the next time I'm on.