It depends upon which Chinese Language version you are using as CJK languages can be multi-byte so it is also best to state in the markup the language e.g. (lang=“zh-Hans”) too but like Ralph said UTF-8 will probably suffice.
iso-8859-1 is for western European (Latin) languages, whereas utf-8 covers most languages.
<meta http-equiv=“Content-Type” content=“text/html; charset=utf-8” />
normally does not set the Content-Type for your web pages.
The Content-Type is primarily sent to the browser from the server in the http header (I’m not confident that that’s the right terminology). So you need to set the Content-Type being sent out by your server.
You can check the actual encoding of your pages in various ways, such as Tools > Page Info in Firefox.