Hi,
I created a new extension (a part of a set of extensions), which is intended for improving categorization in complex languages such as Chinese by supporting sorting pages in a category in more than way, and is expected to be installed on Chinese Wikipedia.
This extension is a common part of all languages. Chinese-specific part will be done in another extension, with the hook, CategoryMultisortSortkeys, specified in this extension.
Please have a look at it.
Repo on Gitorious: http://gitorious.org/mediawiki-categorymultisort Extension page on MediaWiki.org: http://www.mediawiki.org/wiki/Extension:CategoryMultisort
--Liangent