Hi Liu @WenLiu ,
It is possible (likely) that you haven’t extracted the Files correctly;
The source Files are a so-called split archive. You need to:
Download all HUMAN_source-files.zip.0xx files in the same location (folder) on your hard drive.
Then Unzip only HUMAN_source-files.zip.001.
In the description of the Course is a link to this Post: https://cgcookie.com/community/11833-human-realistic-portrait-creation-more-info
Where this is also mentioned (it’s a long article, but well worth reading).
