http://chinahotels.org/affiliate_registration_form.html
Most of the big hotel affiliates have Chinese hotels and Chinese language interface, not sure which ones accept local RMB payment though (without credit card).
http://partners.agoda.com/
https://affiliates.hotelclub.com/
http://www.wctravel.com/
http://www.booking.com/general.html?...ocs/affiliates
http://www.ian.com/ian/signup/home.jsp
Have used sinohotel, hotelclub, wctravel.
Sinohotel seems to be the most suited, good selection of hotels and good prices (comparable to travel agents) - but they have a poor tracking system and not the best to setup and integrate into a site.