http://download.simplemachines.org/?smflanguages;lang=chinese-simplified
http://download.simplemachines.org/?smflanguages;lang=chinese-traditional
download file , zip Archive error?
You are right cnbohu, there is a problem with Chinese language file packages.
Sorry for the inconvenience, I believe it will be sorted out ASAP.
Until problem is fixed, please have a look at attachments in http://www.simplemachines.org/community/index.php?topic=466028.msg3272499#msg3272499