Hi jack, in China you don't need to buy wow, just buy a gametime recharge and you can play. You need to create an account there https://www.battlenet.com.cn/account/management/?lnk=1 (chinese ID required)
for the client you can play using the foreign one, with a few tweaks. Check the "important guides" links on the forum banner
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