How to send email with Chinese characters?

Using CDO. I have in mind something like this:
http://blog.sina.com.cn/s/blog_54135a2f01000bqv.html
I'm using classic ASP, but the thing still doesn't work. I set language code like this:
Fields["http://schemas.microsoft.com/cdo/configuration/languagecode"].Value = "zh-ch";   = same as 0x0804;
and
oMsg.HTMLBodyPart.Charset = "gb2312";
but I still get jibrish on the other side when reading email instead of proper characters. What to do? What did I do wrong?
It's encoding problem but I'm missing something.