How can I import google maps into google earth?

I found a Chinese version of Google maps (ditu.google.cn) that has zoomable street maps that I'd like to add into/overlay into Google earth. How is this possible?
How can I import google maps into google earth?
i'm not sure but i think you can ONLY import google earth into google maps. not the other way around.





http://www.google.com/search?%26amp;q=How%2Bca...