Hi davidcop,
The best solution for european and asia markets is the OK Online Casino that have support in several languages, software in 16 languages including Chinese Simplified and Traditional.
Check the next screenshot where the players can choose that language on software want:
http://www.okonlinecasino.com/images/instal/language_screen.jpg
You can register on affiliate program of this casino in OK Online Casino Affiliate Program – Gambling Federation
After your account is activated, you have access of your link ID of the casino and the download too, so you can register accounts in chinese with your affiliate link for your chinese players and start to win big bucks!
About the comissions, you can get 40% up to 55% depending the deposits of your chinese players each week. Check the comissions values:
Weekly Net Gaming Revenue:
$/€/£0 to $/€/£ 3500 – 40%
$/€/£ 3501 to $/€/£ 7500 – 45%
$/€/£7,501 to $/€/£20,000 – 50%
$/€/£20,001 and above – 55%
The payments for affiliates are monthly by check, wire transfer, Neteller or Moneybookers (minimum payment €/£/$500).
If you have any question or need help, you can contact the support by mail.
Cheers,