It looks like the Chinese Office 2010 font list is the following (Changzhou SinoType, Founder, Microsoft, Stone):
- FZShuTi
- FZYaoTi
- LiSu
- Microsoft YaHei
- Microsoft YaHei Bold
- STCaiyun
- STFangsong
- STHupo
- STKaiti
- STLiti
- STSong
- STXihei
- STXingkai
- STXinwei
- STZhongsong
- YouYuan
From the language pack make sure to select <span lang="zh-CN">国际字体</span> (international fonts) and <span lang="zh-CN">校对工具</span> (proofing tools). Under <span lang="zh-CN">国际字体</span> we have <span lang="zh-CN">典型字体</span> (typical fonts) and under <span lang="zh-CN">校对工具</span> we have <span lang="zh-CN">简体中文校对工具</span> (Simplified Chinese proofing tools) and <span lang="zh-CN">英语校对工具</span> (English proofing tools).