Dear Chiongguo,

www.homeoint.org contains a lot of literature that you could browse for free, also I think there is a site of someone (if I recall correctly, the person's name is Arden Wong) from Singapore in Chinese re homeopathy, that might be interesting.
Also
http://www.hpathy.com/essentia/advanced.asp
would be worth a look.

BEst of luck with your studies!

Elena