Question: What HTML tag represents the symbol for Chinese currency?

Or is there such a tag?

Answer: 
I think you possibly want CNY (ie. Chinese yuan). Also sometimes known as RMB.

<http://en.wikipedia.org/wiki/Renminbi>
The symbol they use is Unicode & # 5 1 4 3 ; which is suffixed, not prefixed, to the amount e.g. 100元