Hi,
Because I noticed that maps.google.com image and plan are not aligned for China mainland and personally observed that only image is well calibrated, I did some search.
I now wonder about the legal aspect.
It looks like you need some approvment to assign a position to any physical asset in China.
Waze edidors are doing so. Could they have problems for China ?
This is from https://productforums.google.com/d/msg/maps/ambcCIPTQiI/vCAGNm8tyVoJ .
Here is another one http://motherboard.vice.com/blog/if-youre-a-foreigner-in-china-it-is-illegal-to-use-gps
Thank you