Now I found Google Earth begin to provide the satellite photo of Shanghai Downtown.
Look the below image, the gray color is the range with the detail photo.
The resolution is not higher then that of North America area. I tried to find my home on Shanghai and get a image to show how about the satellite photo of Shanghai.
You can see a car, but can not see a person.
I tried the Beijin, the persons stand on the TianAnMen square can be identified.
When span the map, along the Huangpu river, the ships built in the shipyard can be seen.