Hi I can't really tell you for sure since I don't play Wow CN anymore, but normally as soon as you put some credit on your account it should become a full one. Also make sure your account is linked to a real Chinese ID.
When you log on a realm type "/join english
" to get in touch with the community members.
WoW English/Chinese glossary
(2000+ translated words) found on wow-in-chinese.jfs-web.chEnglish speakers are consolidating on the same realm for Cataclysm check this thread