Copy from Wikipedia:
The Frontier Closed Area,FCA (Boundary Closed Area before 2006) is an area in Hong Kong extended inwards from the border with China. For anyone to enter the area a Closed Area Permit is required.
Established to prevent illegal immigrants from China and other illegal activities, the closed area is fenced along its perimeter to serve as a buffer between the closed border and the rest of the territory.
Developments are tightly controlled within the area, which has become a natural habitat for animals and plants.
Government had planned several phase of reduction of FCA, that cache is located at the old check point of Sha Tau Kok.
GPS signal is not good there, please check the upload photo, do u see a bike? Yes, I bike there and put that cache, so the cache is located near where I park.
Munzee: Yes
PS: This cache is "Throwdown Welcome", please check the bookmark for detail.