Good idea. For PVP in Rogue Dynasty, being able to contact the other player is pretty much a must or you could get stuck in battles for a long time.

You can send me a message on Facebook messenger. Just find me at Facebook.com/allensam. You can send me a friend request if you want but be sure to tell me who you are. I don't usually accept random friend requests.

I also have WeChat. I know a lot of our new players are from this side of the world where Wechat is popular. My Wechat ID is AllenSam. Again, let me know who you are if you add me.

tl;dr
Facebook.com/allensam
Wechat: AllenSam