You receive this mail because you are one of the Yue Xiu Park cachers. I got a Yuxiu Park CAD file by chance and want to share with you. :)
The CAD zip file is about 6830kb, you can download it in from here, only one file included.
It'a an real length map, you can ruled the distance as fact.
I marked the cache near "37855, 30719", wish you can enjoy it.