How to find this Nano cache? Go South through the tourist street Sanfangqixiang, until you see a device, which was used a long time ago before we started using modern communication devices.
The device has yellow Chinese characters. You do not have to leave the main path.
Hint: If you see a little stand which sells Stone Engraving Art, then you are almost there.
If you arrive at McDonalds on the right side, you went to far.
Once you found the device, find the spoiler in 20 m vicinity.