1. Download Windows ADK packages from here:
http://www.microsoft.com/en-US/download/details.aspx?id=39982
Install Windows ADK according ADK guide.
2. Copy \\coreserver\ldmain\landesk\files\vboot\boot.wim to d:\osd\winpe_amd32\mount
3. Run following command to add Chinese packages into boot.wim:
DISM.exe /mount-wim /wimfile:d:\osd\vboot\boot.wim /index:1 /mountdir:d:\osd\winpe_amd32\mount
DISM.exe /Image:\OSD\winpe_amd32\mount /Add-Package /PackagePath:"C:\Program Files\Windows Kits\8.0\Assessment and Deployment Kit\Windows Preinstallation Environment\x86\WinPE_OCs\WinPE-FontSupport-ZH-CN.cab"
DISM.exe /Image:\OSD\winpe_amd32\mount /Add-Package /PackagePath:"C:\Program Files\Windows Kits\8.0\Assessment and Deployment Kit\Windows Preinstallation Environment\x86\WinPE_OCs\zh-cn\lp.cab"
Dism.exe /image:\OSD\winpe_amd32\mount /Get-Intl
Dism.exe /image:\OSD\winpe_amd32\mount /Set-UILang:ZH-CN
Dism.exe /image:\OSD\winpe_amd32\mount /Set-AllIntl:ZH-CN
Dism.exe /unmount-Wim /MountDir:\OSD\winpe_amd32\mount /Commit